Is it possible to use SPAW to add a link to another "file" but somehow use a (Smarty?) tag that will plug in the xoops_url?

If SPAW can not be used to get that URL, is there a way to use the basic text box? I'm looking for a way to use a test machine to put a site together and then move the whole thing into production.

Our scenario is the following:
http://my_test_box.com/theTestSite
will move to:
http://my_production_site.com/

The reason I am asking, we have several Tiny-D content modules installed and want to link to a specific page. I've noticed when I add a relative link the absolute URL is entered into the database. When I move to production all of the links break and I'm looking for a way to use relative paths for the URL's or rely on the xoops_url for my links.

Thanks for any help or guidance you may offer!