show logout button along with the name of user after successfull login

Question

I am a yiibie, and i am stuck at a point. I have three roles in my project. 1.Admin. 2.Owner 3. Authenticated User. I have a header and a footer widget.In header widget which is

Answer 1

Is easy after login you can see the username otherwise you see nothings

user->isGuest) {
    echo Yii::app()->user->name;
   }
 ?>