How To use Theme in Yii

gistfile1.php

//I wil show you 2 Types

/**
* 1.
* in you want put this in your main.php
* this way is for all controllers
*/
return array(
		'theme' => NAME of your Folder in www/themes/ example:'bootstrap',
    

/**
* 2.
* in your controller 
*/

public function init()
{
  Yii::app()->theme = 'bootsrap';
}