Line - Homepage Portfolio Carousel from Specific Categories

<?php global $data; ?>
    <section>
        <?php
        if(!empty($data['portfolio_title'])) {
        ?>
            <div class="bgtitle"><h2><?php _e($data['portfolio_title'],'line'); ?></h2></div>
        <?php } ?>

        <ul id="mycarousel">
            <?php
            if(!empty($data['portfolio_number'])) {
                $portfolio_nr = $data['portfolio_number'];
            }
            else {
                $portfolio_nr = -1;
            }

            $args = array(
                'orderby'=> 'post_date',
                'order' => 'rand',
                'post_type' => 'portfolio',
                'portfolio_cats' => 'branding',
                'posts_per_page' => $portfolio_nr
            );

            $my_query = new WP_Query($args);
            if( $my_query->have_posts() ) {
                while ($my_query->have_posts()) : $my_query->the_post();

                $p_icon = get_post_meta($post->ID,'dt_portf_icon',true);
                $thumb_ids = get_post_thumbnail_id($post->ID);

                $pthumbnail = wp_get_attachment_image_src(get_post_thumbnail_id(), 'portfolio-thumb');
                ?>

                <li>

                    <?php
                    $portf_icon = get_post_meta($post->ID,'dt_portf_icon',true);
                    $thumb_id = get_post_thumbnail_id($post->ID);

                    // Check if wordpress supports featured images, and if so output the thumbnail
                    if ( (function_exists('has_post_thumbnail')) && (has_post_thumbnail()) ) :

                        if ($portf_icon == 'lightbox_to_image') {  ?>
                        <a href="<?php echo wp_get_attachment_url($thumb_id);?>" rel="prettyPhoto">
                            <span class="item-on-hover">
                                <span class="hover-image"></span>
                            </span>
                            <?php the_post_thumbnail('portfolio-thumb'); ?>
                        </a>

                        <?php }
                        else if ($portf_icon == 'link_to_page') {  ?>
                        <a href="<?php the_permalink(); ?>">
                            <span class="item-on-hover">
                                <span class="hover-link"></span>
                            </span>
                            <?php the_post_thumbnail('portfolio-thumb'); ?>
                        </a>

                        <?php }

                        else if ($portf_icon == 'lightbox_to_video') {

                            $portfolio_slide = get_post_meta($post->ID,'dt_slider_repeat',true);
                                if(!empty($portfolio_slide)) {
                                    $get_video = array();
                                    $j=0;
                                    foreach ($portfolio_slide as $slide){
                                        $video = $slide['dt_video_field_id'];
                                        if (!empty($video)) {
                                            $get_video[$j] = $video;
                                            $j++;
                                        }

                                    }
                                }
                        ?>
                            <a href='<?php
                                $input_string = $get_video[0];
                                $count = preg_match('/src=(["\'])(.*?)\1/', $input_string, $match);
                                if ($count === FALSE)
                                    echo('not found\n');
                                else
                                    echo($match[2] . "\n");
                            ?>'>
                                <span class="item-on-hover">
                                    <span class="hover-video"></span>
                                </span>
                                <?php the_post_thumbnail('portfolio-thumb'); ?>
                            </a>

                        <?php }

                    endif; ?>

                    <?php // Output the title of each portfolio item ?>
                    <span class="caption"><a href="<?php the_permalink(); ?>"><?php echo get_the_title(); ?></a></span>
                </li>
                <?php endwhile; wp_reset_query(); } ?>
        </ul>
    </section>