Custom Widget View

How to override the widget to change css style/class, html etc.

C:\wamp\www\\yii\framework\zii\widgets\grid\CDataColumn.php <- how to override :) I don’t have to adjust every time the view.

For a long time I used Joomla and there to write a view, just copy the view file to the my template directory.

Is possible in YII ?

Thx for reply :)