/**
  * Кэш специальностей
  *
  * @static
  * @return CArrayList
  */
 public static function getCacheSpecialities()
 {
     if (is_null(self::$_cacheSpecialities)) {
         self::$_cacheSpecialities = new CArrayList();
         foreach (CActiveRecordProvider::getAllFromTable(TABLE_SPECIALITIES)->getItems() as $item) {
             $term = new CSpeciality($item);
             self::$_cacheSpecialities->add($term->getId(), $term);
         }
     }
     return self::$_cacheSpecialities;
 }