How To Load Relationshep Values In Listdata()

Hi

I need to know how to call relationship in listData() ,

For Example in normal way we can call it like :

$model->section->section_name ;

in my code i just print value as number but I need to print string value from courses table .

   public function coursesList($section_id) {
    	
    	
    	$data=Msection::model()->findAll('section_id=:section_id', 
              	array(':section_id'=>(int)$section_id));
          	
              	
    	return CHtml::listData($data,'course_id','course_id');
 //// can i call it like : ///listData($data,'course_id->course->course_name','course_id');
	}

Can I call it like?

listData($data,'course_id->course->course_name','course_id');

How To fix that ?

thanks in advance