Вывод ссылок на предыдущий и следующий элементы при выводе инфоэлемента

   else
   {

/* =Следущий/предыдущий товар*/
$mas = $shop->GetShop($current_shop_id);

$order_field = $mas['shop_sort_order_field'];
$order_type = $mas['shop_sort_order_type'];

      switch ($order_field)
      {
         default:
         case 0:
            $name_field = 'shop_items_catalog_date_time';
            break;
         case 1:
            $name_field = 'shop_items_catalog_name';
            break;
         case 2:
         $name_field = "shop_items_catalog_order , shop_items_catalog_name";
            break;
      }
      
      switch ($order_type)
      {
         default:
         case 0:
            $order_field = 'Asc';
            break;
         case 1:
            $order_field = 'Desc';
            break;
      }

   $DataBase = & singleton('DataBase');
   $prev = false;
   $next = false;
   $current_date = date('Y-m-d H:i:s');
   $current_group = intval($GLOBALS['shop_item_path']['group']);

   $query = "SELECT SQL_CALC_FOUND_ROWS DISTINCT shop_items_catalog_table.shop_items_catalog_item_id, `shop_items_catalog_modification_id`
   FROM shop_items_catalog_table
   LEFT JOIN shop_groups_table
   ON shop_items_catalog_table.shop_groups_id = shop_groups_table.shop_groups_id
   WHERE shop_items_catalog_table.shop_shops_id = '$current_shop_id'
   AND shop_items_catalog_table.shop_items_catalog_is_active = '1'
   AND (shop_items_catalog_table.shop_items_catalog_putend_date >= '$current_date'
   OR shop_items_catalog_table.shop_items_catalog_putend_date ='0000-00-00 00:00:00')
   AND shop_items_catalog_table.shop_items_catalog_putoff_date <= '$current_date'
   AND (shop_items_catalog_table.shop_groups_id = '$current_group')
   ORDER BY $name_field $order_field LIMIT 0, 9999";  
     
      $result = $DataBase->select($query);

      while ($row = mysql_fetch_assoc($result))
      {
      if ($row['shop_items_catalog_item_id'] == to_int($GLOBALS['shop_item_path']['item']))
         {
            $next_row = mysql_fetch_assoc($result);
         $next = $next_row['shop_items_catalog_item_id'];
            break;
         }
        
      $prev = $row['shop_items_catalog_item_id'];
      }

      $item_info = $shop->GetItem($prev);
      $item_path = $item_info['shop_items_catalog_path'];
      
      if($item_path != '')
      {
      $external_propertys['PrevName'] = $item_info['shop_items_catalog_name'];
      $external_propertys['PrevLink'] = $item_path;
      }

   $item_info = $shop->GetItem($next);
   $item_path = $item_info['shop_items_catalog_path'];
      
      if($item_path != '')
      {
      $external_propertys['NextName'] = $item_info['shop_items_catalog_name'];
      $external_propertys['NextLink'] = $item_path;
      }
/* =/Следущий/предыдущий товар*/
      
      
      /* Вывод конкретного элемент */
      //$param['show_catalog_item_type'] = array('active', 'inactive');
      $param['xml_show_group_type'] = 'tree';
      $param['current_group_id'] = $GLOBALS['shop_item_path']['group'];

      // Запрещаем передачу в XML свойств групп
      $param['xml_show_group_property'] = false;
      
      /* Вывод конкретного элемент */
      $shop->ShowItem($GLOBALS['shop_item_path']['item'], $xsl_item, $param, $external_propertys);
   }
}
?>

      <div class="prevnext">
         <div class="prev">
            <xsl:choose>
               <xsl:when test="/shop/PrevLink !=''">
                  <a href="{/shop/path}{//group[@id=$parent_group_id]/fullpath}{/shop/PrevLink}/">« Предыдущий товар</a>
               </xsl:when>
               <xsl:otherwise>
                  <span>« Предыдущий товар</span>
               </xsl:otherwise>
            </xsl:choose>
         </div>
         <div class="next">
            <xsl:choose>
               <xsl:when test="/shop/NextLink !=''">
                  <a href="{/shop/path}{//group[@id=$parent_group_id]/fullpath}{/shop/NextLink}/">Следующий товар »</a>
               </xsl:when>
               <xsl:otherwise>
                  <span>Следующий товар »</span>
               </xsl:otherwise>
            </xsl:choose>
         </div>
      </div>

$InformationSystem = & singleton('InformationSystem');

$GLOBALS['LA_InformationSystem'] используйте $InformationSystem