protected static function normalizeCheckBoxAndRadio($input)
    {
        $parts = preg_split("/(<.*?>)/", $input, 2, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
        if (isset($parts[1])) {
            return $parts;
        } else {
            return array('', $parts[0]);
        }
    }