Links within a dynamic text box

Hey,

ok, heres a run down of what I'd like to do...
I've got a dynamic text box that loads text from an XML file. I want to be able to have certain parts of this text as links, to call another XML file to be loaded.

for example
Textbox contains
----------
Student Association

The SA represents ........
some of the services provided by the SA include:
Unibar
Shop
Photocopying
----------------

and the services text would call another XML file, that contains the text for that service.

Is it possible to do this using XML?? If so, how so??