Correct way to render a form in a modal or bootbox in Yii

Correct way to render a form in a modal or bootbox in Yii

I'm having some trouble trying to work out how to render a form within a
modal box within Yii.
Currently I have the following code, in which I've just worked in getting
a link to display a modal box.
CHtml::link(' Email this Gift', '#', array(
'id' => 'giftModal',
'onclick'=>'js:bootbox.confirm("hello world")',
)
);
I really need to render a form within the modal box. How do I do that, I
have actually spent quite a while looking at how to accomplish this, but
I've clearly been searching incorrectly, so would appreciate any guidance.
Thank you