static private function filterKeys( array &$keys )
    {
        if ( isset( $GLOBALS['eZRequestError'] ) && $GLOBALS['eZRequestError'] === true )
        {
            $requestUri = eZSys::requestURI();
            foreach ( $keys as $i => &$key )
            {
                if ( is_array( $key ) )
                {
                    self::filterKeys( $key );
                }
                else if ( $key === $requestUri )
                {
                    unset( $keys[$i] );
                }
            }
        }
    }