public function rules()

{

    return CMap::mergeArray( parent::rules(),array(

            array('third_link', 'urlArr'),

    ));

}

public function urlArr($attribute, $params)

{

    $arr = explode(chr(0), $this->third_link);

    $pass = true;

    $validator = new CUrlValidator();

    $falseUrl = [];

    foreach($arr as $v){

        if(!$validator->validateValue($v)){

            $pass = false;

            $falseUrl[] = $v;

        }

    }

    if(!$pass)

        $this->addError($attribute, '第三方监测('.implode(', ', $falseUrl).') 不是有效的 URL');

    return $pass;

}