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static function get_post_img_mosaic($post_id){

EDIT THE FUNCTION (hole function):

/*generates content for gallery slider when 'mosaic' mode is set*/
        static function get_post_img_mosaic($post_id){


            /*check the meta data where the attached image ids are stored*/

            $post_image_gallery_meta = get_post_meta( $post_id, '_post_image_gallery', true );

            if(strlen($post_image_gallery_meta) && 'Array' != $post_image_gallery_meta){
                $product_image_gallery = $post_image_gallery_meta;

                $img_id_array = array_filter( explode( ',', $product_image_gallery ) );
            }else{
                //backward compatibility with version prev to 1.1
                $attachet_gallery_ids = meta::get_meta( $post_id, 'imagesattached' );

                if(isset($attachet_gallery_ids['img_ids']) && strlen($attachet_gallery_ids['img_ids'])){
                    /*mata is stored as a string of numbers separated by comma (ex: 909,914,913,912,911,910,908)*/
                    $img_id_array =  explode(',', $attachet_gallery_ids['img_ids']);  //create an array from the string


                }
            }

            if(isset($img_id_array) && is_array($img_id_array)){
                foreach ($img_id_array as $value) {
                    $attachments[$value] = $value; // create attachments array in the format that will work for us
                }
            }


            if(!isset($attachments)){ // if no meta is attached to the post then the gallery wil be created from attached images
                $attachments = get_children(array('post_parent' => $post_id,
                        'post_status' => 'inherit',
                        'post_type' => 'attachment',
                        'post_mime_type' => 'image',
                        'order' => 'ASC',
                        'orderby' => 'menu_order ID'));
            }

            if( isset($attachments) && count($attachments) > 0){
            ?>
                <div class=" row mosaic-view thumb-view gallery-mosaic-view">

                    <div class="twelve columns">
                        <div class="row masonry for-mosaic" >
            <?php
                        $counter = 0;
                        $pretty_colection_id = mt_rand(0,99999);
                        foreach($attachments as $att_id => $attachment) {
                            $options =  array('post_number' => $counter);


                            $attachment_info = get_post($att_id); //deb::e($attachment_info );
                            if( is_object($attachment_info) && isset($attachment_info->post_excerpt)){
                                $caption = $attachment_info->post_content;
                            }else{
                                $caption = '';
                            }

                            $img_title = $attachment_info -> post_title;

                            //------------------------------------
                            $default_options = array('post_number' => 0); /*default options*/

                            extract( $options ); /*extract the passed options*/
                            extract( $default_options, EXTR_PREFIX_SAME, "default"); /* eXtract default options with 'default' prefix in case the option with the same name was already passed */



                            $position_info = post::get_mosaicinfo_by_order($post_number % 12);
                            $container_width = $position_info['width'];
                            $thumb_size = $position_info['thumb_size'];
                            $container_class = $position_info['container_class'];

                            if( trim($container_class) == 'large-mosaic-elem'){
                                $thumb_width = 720;
                                $thumb_height = 720;
                                $thumb_no_img = 'thumb-transparent-img.png';
                            }elseif(trim($container_class) == 'long-mosaic-elem'){
                                $thumb_width = 340;
                                $thumb_height = 720;
                                $thumb_no_img = 'no-img-long.png';
                            }else{
                                $thumb_width = 340;
                                $thumb_height = 340;
                                $thumb_no_img = 'thumb-transparent-img.png';
                            }

                            $no_img_class = '';

                            if(options::logic( 'blog_post' , 'disable_hover_effect' )){
                                $disable_hover_effect = '';
                            } else { $disable_hover_effect = 'hovermove'; }

                            $custom_fields = get_post_custom($att_id);
                            //deb::e($custom_fields);
                            $custom_link_db = '';
                            $custom_link_tab = '';
                            $tab = '';
                            if (isset($custom_fields['custom_link'])) {
                                $custom_link_db = $custom_fields['custom_link'][0];
                                $custom_link_tab = $custom_fields['custom_link_tab'][0];

                                $tab = $custom_link_tab == 'yes' ? 'target="_blank"' : '';
                            }

                        ?>
                            <div class="masonry_elem <?php echo $container_width; ?> columns">
                                <div class="thumb-elem  <?php echo $disable_hover_effect?> <?php echo $container_class; ?> large-mosaic-elem">

                                    <header class="thumb-elem-header">
                                        <div  class="featimg ">

                                            <?php


                                                $size = 'grid_small';

                                                $img_url = wp_get_attachment_url( $att_id ,'full'); //get img URL

                                                $img_src = aq_resize( $img_url, get_aqua_size($thumb_size), get_aqua_size($thumb_size, 'height'), true, false); //crop img
                                                //====================
                                                //$img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post_id ) , $thumb_size );

                                                $img_width = $img_src[1];
                                                $img_height = $img_src[2];

                                                if($img_width != $thumb_width || $img_height != $thumb_height){
                                                    /*if the image doesn't have the requested size then we will add a transparent square image and will give position absolute to the original image*/
                                                    $original_img_style = 'style="position:absolute"';
                                                }else{
                                                    $original_img_style = '';
                                                }
                                            ?>
                                                <img class="the-thumb" src="<?php echo $img_src[0]; ?>" alt=""  style="position:absolute" />
                                                <img src="<?php echo get_template_directory_uri() ?>/images/<?php echo $thumb_no_img;  ?>" alt="<?php echo $caption; ?>" />
                                                <div class="image-title"><?php echo $img_title; ?></div>
                                                <div class="image-description"><?php echo $caption; ?></div>

                                                <?php if( options::logic( 'blog_post' , 'enb_lightbox' )  && $custom_link_db == ''){ ?>
                                                <div class="zoom-image">
                                                    <a href="<?php echo $img_url; ?>" data-rel="prettyPhoto[<?php echo $pretty_colection_id; ?>]" title="<?php echo $img_title.' - '.$caption; ?>">&nbsp;</a>
                                                </div>
                                                <?php } else if ($custom_link_db != '') { ?>

                                                <div class="custom-link">
                                                    <div class="icon-link"></div>
                                                    <a  href="<?php echo $custom_link_db;?>" <?php echo $tab; ?> >&nbsp;</a>
                                                </div>

                                            <?php    } ?>


                                        </div>
                                    </header>

                                </div>
                            </div>
                        <?php


                            $counter ++;
                        }

            ?>
                        </div>
                    </div>
                </div>
            <?php
            }else{
                _e('This gallery has no images attached', 'cosmotheme');
            }
        }