CGridView related objects column.

view.php

<?php

// assuming we have a User model that has a relation to Profile model named 'profile'

/** @var User $user The user model */

$this->widget('zii.widgets.grid.CGridView', array(
	'id'=>'user-grid',
	'dataProvider'=>$user->search(),
	'filter'=>$user,
	'columns'=>array(
		'id',
		'profile.name', // <-- will show the name of related profile
		'description',
                'created',
                'updated',
		array(
			'class'=>'CButtonColumn'
		)
	)
));