You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <pages>
      <page ns="14" title="Category:List of template categories" missing="" />
      <page pageid="2234" ns="14" title="Category:List of Case different redirect pages" touched="2013-09-21T21:47:05Z" lastrevid="5620" counter="2542" length="168" new="" />
      <page pageid="1912" ns="14" title="Category:List of Template categories" touched="2013-07-16T03:42:03Z" lastrevid="4698" counter="3918" length="706" />
      <page pageid="1733" ns="14" title="Category:List of redirect pages" touched="2013-09-23T23:21:07Z" lastrevid="4954" counter="4083" length="650" />
    </pages>
  </query>
</api>