Yii Framework: How to specify a column alias.

Forum.php

<?php
class Forum extends ActiveRecord
{
    public $max_number;
    public $max_create_time;

    ...
    public function getLatestAll()
    {
        $c = new CDbCriteria();
        $c->with = array('topic');
        $c->select = 'MAX(t.number) AS max_number, MAX(t.create_time) AS max_create_time';
        $c->group = 't.topic_id';
        $c->order = 'mac_create_time DESC';

        return $this->findAll($c);
    }
    ...

index.php

<?php foreach ($models as $model): ?>
    <?php echo CHtml::encode($model->max_createtime); ?> 
    <?php echo CHtml::encode($model->max_number); ?>
    ...
<?php endforeach; ?>

thank you. ^^