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