call action of another controller to render grid view data column

Yii 1.1 General Discussion
1

i have a grid view and i would like to get value of column from another action controller.

at now i have this in controller 1


        array(

            'name'=>'title',

            'value'=>array($this,'Action2'),

        ),

and i get this error:


controller1 and its behaviors do not have a method or closure named "Action2".

if i replace $this with "controller2"


        array(

            'name'=>'title',

            'value'=>array('controller2','Action2'),

        ),

i get this error


call_user_func_array() [<a href='function.call-user-func-array'>function.call-user-func-array</a>]: First argument is expected to be a valid callback, 'controller2::action2' was given

maybe this is bad practice but is this feasible?