Prevent tidy from escaping URIs

Hi all,

I'm using Tidy to clean up my HTML, and I'm running into the issue of
it convering my URIs from:

<link href="<?= base_url() ?>media/js/extjs/css/ext-all.css"
rel="stylesheet" type="text/css" media="screen" />

TO:

<script src="%3C?=%20base_url()%20?%3Emedia/js/extjs/ext-base.js"
type="text/javascript">

Any idea what toggle there is to disable that, and more importantly,
why is it doing that?

Thanks. :-)

- sf