You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks alcontinue="Blender_Greek_users_meeting_19" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="Backup and Restore" />
      <l ns="0" title="Beer Brew" />
      <l ns="0" title="Beer Brewing 20130407" />
      <l ns="0" title="Bike Maintenance 101" />
      <l ns="0" title="Bitcoin Study Group" />
      <l ns="0" title="Bitcoin Study Group Meetup 20130605" />
      <l ns="0" title="Blender 3D Lessons" />
      <l ns="0" title="Blender Greek users meeting" />
      <l ns="0" title="Blender Greek users meeting 17" />
      <l ns="0" title="Blender Greek users meeting 18" />
    </alllinks>
  </query>
</api>