/**
  * @static
  * @return CArrayList
  */
 public static function getCacheTitles()
 {
     if (is_null(self::$_cacheTitles)) {
         self::$_cacheTitles = new CArrayList();
         foreach (CActiveRecordProvider::getAllFromTable(TABLE_TITLES)->getItems() as $item) {
             $term = new CTerm($item);
             self::$_cacheTitles->add($term->getId(), $term);
         }
     }
     return self::$_cacheTitles;
 }