yii模版中的写法

<tr>
    <th valign="top"><p class="bh-mTop5"><?php echo $form->label($model,'remark'); ?>：</p></th>
    <td colspan="5">
        <?php echo $form->textArea($model,'remark',array('class'=>'', 'rows'=>3,'cols'=>80)); ?>
        <?php echo CHtmlExt::requiredSign($model, 'remark');?>
	<?php echo CHtmlExt::inputError($model, 'remark');?>
    </td>
</tr>

都是调用model中的东西，的确很厉害