Form validation by my own method

Hello, lexxtoronto!

Thank you for your answer! But how can I use method wich takes two parameters in the array with rules?
"rules" => array("trim", "required", array("is_accessable", array($this->users, "get_access"))),
If I don't pass any parameters it means that this function takes only one parameter "login.value". Isn't? How can I pass second parameter in this $rules array?