php yii framework probleem met objecten (2)

Schrijf uw code zoals hieronder:-

 // CGridView column definition:
        'columns'=>array(
            array(
                'name'=>'naziv',
                'value'=>'$data->studijskiProgram->naziv',
                'type'=>'text',
            ),

    // Preparing the DataProvider in the model:
    return new CActiveDataProvider(get_class($this),array(
        'sort'=>array(
            'multiSort'=>false,
            'attributes'=>array(
                'naziv'=>array(                
                    'desc'=>'naziv desc',
                ),