url rewriting on href

Hi,

I have url stored in DB, like "www.google.com" and I just pass them in my
template to an href attribute, like this :

<t:Loop t:source="urls" t:value="url">
- <a href="${url}" target="_blank">${url}</a>


</t:Loop>

The value of ${url} in the href attribute is rewrote to concatenate the
actual displayed page url. Why is there url rewriting here ? And how can I
disable it ?