filter gifts

  <?php
            global $wpsc_query;

            if(get_option('permalink_structure')){
                $sep = '?';
                if(isset($wpsc_query->query_vars['wpsc_product_category']))
                    $page_url = get_permalink(wpec_get_the_post_id_by_shortcode('[productspage]')) . $wpsc_query->query_vars['wpsc_product_category'] . '/';
                else
                    $page_url = get_permalink(wpec_get_the_post_id_by_shortcode('[productspage]')) . $wpsc_query->query_vars['wpsc_product_category'];
            }else{
                $sep = '&';
                if(isset($_GET['wpsc_product_category']))
                    $page_url = get_bloginfo('url') . '?wpsc_product_category=' . $wpsc_query->query_vars['wpsc_product_category'];
                else
                    $page_url = get_permalink(wpec_get_the_post_id_by_shortcode('[productspage]'));
            }


            $gift = ((!empty($_GET['gift']) && ($_GET['gift'] != 'all')) ? $_GET['gift'] .','  : '');
            $gift_slug = (($_GET['gift'] == 'all') ? 'gift=all' : ((!empty($_GET['gift'])) ? 'gift=' . substr($gift, 0, -1) . '' : '' ) );

            ?>
            <h1 class="menu-title">TYPE</h1>
            <input type="hidden" name="gift" value="<?php echo $_GET['region']; ?>"/>
             <?php
            $i=1;
            $terms_gift = get_terms("wpsc_gift_type", array('hide_empty' => 0, 'orderby' => 'term_group'));
            if (count($terms_gift) > 0) { ?>
                <ul>
                    <li class="<?php echo (($_GET['gift'] == 'all') ? 'active' : ''); ?>">
                        <a href="<?php echo $page_url; ?><?php echo $sep; ?>gift=all">
                            <input onclick="window.location='<?php echo $page_url; ?><?php echo $sep; ?>gift=all'" type="checkbox" <?php echo (($_GET['gift'] == 'all') ? 'checked=""' : ''); ?> class="checkbox"/>
                            All</a>
                    </li>
                        <?php
                        $gift_value = explode(',', $gift);
                        foreach ($terms_gift as $term_g) {
                            if(in_array($term_g->slug, $gift_value)){
                                $term_slug_g = '';
                                $gift_value_str = $gift_value;

                                $key_g = array_search($term_g->slug, $gift_value_str);
                                unset($gift_value_str[$key_g]);
                                $gift_value_str = implode(',', $gift_value_str);

                                $gift_value_str = substr($gift_value_str, 0, -1);
                                ?>
                                <li class="active sp-sub-fields ">
                                    <a href="<?php echo $page_url; ?><?php echo $sep; ?><?php echo ((empty($gift_value_str)) ? '' : 'gift=' ) ?><?php echo $gift_value_str .''. $term_slug_g; ?>">
                                        <input onclick="window.location='<?php echo $page_url; ?><?php echo $sep; ?><?php echo ((empty($gift_value_str)) ? '' : 'gift=' ) ?><?php echo $gift_value_str .''. $term_slug_g; ?>'" type="checkbox" checked="" class="checkbox"/>
                                        <?php echo $term_g->name; ?></a>
                                </li>
                                <?php
                            } else {
                                $term_slug_g = $term_g->slug;
                                ?>
                                <li class="sp-sub-fields ">
                                    <a href="<?php echo $page_url; ?><?php echo $sep; ?>gift=<?php echo $gift .''. $term_slug_g; ?>">
                                        <input onclick="window.location='<?php echo $page_url; ?><?php echo $sep; ?>gift=<?php echo $gift .''. $term_slug_g; ?>'" type="checkbox" class="checkbox"/>
                                        <span class="sp-price"><?php echo $term_g->name; ?></span></a>
                                </li>
                                <?php
                            } ?>
                        <?php
                        $i++;
                        } ?>
                </ul>
                <?php
            }
            ?>