<div id="single" class="ad-gallery">
  <div class="ad-image-wrapper">
  </div>
  <div id="description"></div>
  <div class="ad-controls">
  </div>
  <div class="ad-nav">
    <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
    <?php $category = get_the_category($post->ID); ?>
    <?php $termlist =  wp_get_post_terms( $_POST['id'], 'clients', array("fields" => "all"));  ?>
    <?php $client = get_terms('clients', 'orderby=count&hide_empty=0'); ?>
    <?php $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'full'); ?>
    <?php $image_thumb = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'thumbnail'); ?>
    <div class="ad-thumbs">
      <ul class="ad-thumb-list">
        <li>
          <a href="<?php echo $image[0]; ?>">
            <img src="<?php echo $image_thumb[0]; ?>" title="<?php echo the_title(); ?>" data-ad-desc="<?php echo the_content(); ?>">
          </a>
        </li>
    <?php endwhile;
        endif;
    ?>
    <?php
            global $post;
            $terms = get_the_terms( $_POST['id'] , 'clients');
            $do_not_duplicate[] = $_POST['id'];

            if(!empty($terms)){
                foreach ($terms as $term) {
                    query_posts( array(
                    'clients' => $term->slug,
                    'posts_per_page' => -1,
                    'caller_get_posts' => 1,
                    'post__not_in' => $do_not_duplicate ) );
                    if(have_posts()){
                        while ( have_posts() ) : the_post(); $do_not_duplicate[] = $post->ID; ?>
                        <?php print_r($post);exit(); ?>
                            <?php $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'full'); ?>
                            <?php $image_thumb = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'thumbnail'); ?>
                        <a href="<?php echo $image[0]; ?>">
                            <img src="<?php echo $image_thumb[0]; ?>" title="<?php echo the_title(); ?>" data-ad-desc="<?php echo the_content(); ?>">
                        </a>
                        <?php endwhile; wp_reset_query();
                    }
                }
            }
    ?>
      </ul>
    </div>
  </div>
</div>