Sample

<?php
public function actionUpdate($id)
{
    $model=$this->loadModel($id);

    if(isset($_POST['User']))
    {
        $model->attributes=$_POST['User'];
        if($_POST['User']['password']==''){
            $model->username=$_POST['User']['username'];
            $model->fullname=$_POST['User']['fullname'];
            $model->phone=$_POST['User']['phone'];
            $model->email=$_POST['User']['email'];
            $model->region=$_POST['User']['region'];
            $model->user_group_id=$_POST['User']['user_group_id'];
            $model->user_type=$_POST['User']['user_type'];
            $model->partner_id=$_POST['User']['partner_id'];
            $model->is_engine_admin=$_POST['User']['is_engine_admin'];
            $model->published=$_POST['User']['published'];
            $model->activate=$_POST['User']['activate'];
        }else{
            $model->username=$_POST['User']['username'];
            $model->fullname=$_POST['User']['fullname'];
            $model->phone=$_POST['User']['phone'];
            $model->email=$_POST['User']['email'];
            $model->password = $model->hashPassword($model->password);
            $model->region=$_POST['User']['region'];
            $model->user_group_id=$_POST['User']['user_group_id'];
            $model->user_type=$_POST['User']['user_type'];
            $model->partner_id=$_POST['User']['partner_id'];
            $model->is_engine_admin=$_POST['User']['is_engine_admin'];
            $model->published=$_POST['User']['published'];
            $model->activate=$_POST['User']['activate'];
        }
        if($model->save())
             $this->redirect('index');
    }

    $this->render('update',array(
        'model'=>$model,
    ));
}