adding image to xml file to use in iphone

i have an xml file , with some text, and i need to add some things like: link and image.. here is my xml file:

<?xml version='1.0' encoding='UTF-8'?>
<about>
  <string name="about">
  my text is here<!--here is my text and i want here to add the image and the link-->
  </string>
</about>

when i add < a > or < img /> all the text disappear in my ios application ( i am trying to do about us and to change about content from xml file) ... any help please?