/**
  * Кэш учебных годов
  *
  * @static
  * @return CArrayList
  */
 public static function getCacheYears()
 {
     if (is_null(self::$_cacheYears)) {
         self::$_cacheYears = new CArrayList();
         foreach (CActiveRecordProvider::getAllFromTable(TABLE_YEARS)->getItems() as $item) {
             $term = new CTerm($item);
             self::$_cacheYears->add($term->getId(), $term);
             self::$_cacheYears->add($term->getValue(), $term);
         }
     }
     return self::$_cacheYears;
 }