yii后台设置，和前台不同的session前缀和，登录地址

//为后台登录管理员设置session名字前缀信息
        Yii::app()->setComponents(array(
            'user'=>array(
                'stateKeyPrefix' =>'seller',
                'loginUrl'=>array('seller/default/login'),
            )
        ));

public function init()
    {
        // this method is called when the module is being created
        // you may place code here to customize the module or the application

        // import the module-level models and components
        $this->defaultController = 'User';
        $this->setImport(array(
            'admin.models.*',
            'admin.components.*',
        ));

        //为后台登录管理员设置session名字前缀信息
        Yii::app()->setComponents(array(
            'user'=>array(
                'stateKeyPrefix' =>'houtai',
                'loginUrl'=>array('admin/default/login'),
            )
        ));
    }