public function actionSejarah()
 {
     $model = new Buku('search');
     $model->unsetAttributes();
     // clear any default values
     if (isset($_GET['Buku'])) {
         $model->attributes = $_GET['Buku'];
     }
     $criteria = new CDbCriteria(array('order' => 'id DESC', 'condition' => 'kategori=10'));
     $dataProvider = new CActiveDataProvider('Buku', array('pagination' => array('pageSize' => 15), 'criteria' => $criteria));
     $this->render('sejarah', array('dataProvider' => $dataProvider, 'model' => $model));
 }