$template->assign_block_vars(
        'categories.category',
        array(
          'SRC'   => $thumbnail_src_of[$category['representative_picture_id']],
          'ALT'   => $category['name'],
          'TITLE' => $lang['hint_category'],
          'ICON'  => $icon_ts,

          'URL'   => make_index_url(
            array(
              'category' => $category
              )
            ),
          'CAPTION_NB_IMAGES' => get_display_images_count
                                  (
                                    $category['nb_images'],
                                    $category['count_images'],
                                    $category['count_categories'],
                                    true,
                                    '<br />'
                                  ),
          'DESCRIPTION' => @$comment,
          'NAME'  => $name,
          )
        );

        
      //plugins need to add/modify sth in this loop ?
      trigger_action('loc_index_category_thumbnail',
        $category, 'categories.category' );
    }