<div style="position:relative;">
<img src="some_image.png"/>
<a href="http://someurl.com" style="position:absolute;top:50px;left:50px;">some text</a>
</div>
<div style="position:relative;">
<img src="some_image.png"/>
<a href="http://someurl.com" style="position:absolute;top:50px;left:50px;">some text</a>
</div>