private function selectExistCat($id)
 {
     $db = new Application_Model_DbTable_Categories();
     $cat = $db->getCategoryById($id);
     $res = true;
     $prods = 0;
     if (count($cat) > 0) {
         $cat = $cat[0]['children'];
         $db2 = new Application_Model_DbTable_Products();
         $prods = $db2->cntProductsInChilds($cat);
         if ($prods == 0) {
             $res = false;
         }
     } else {
         $res = false;
     }
     return $res;
 }