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>
    <allcategories>
      <c size="0" pages="0" files="0" subcats="0" xml:space="preserve">British Open</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Golf</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Golfstream</c>
      <c size="0" pages="0" files="0" subcats="0" xml:space="preserve">Open Championship</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Sports and games portals</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Айроны</c>
      <c size="2" pages="2" files="0" subcats="0" xml:space="preserve">Википедия:Шаблоны для документирования шаблонов</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Гольф Клубы</c>
      <c size="4" pages="3" files="0" subcats="1" xml:space="preserve">Гольф в России</c>
      <c size="46" pages="46" files="0" subcats="0" xml:space="preserve">Гольф клубы</c>
    </allcategories>
  </query>
  <query-continue>
    <allcategories acfrom="Гольф клубы Москвы" />
  </query-continue>
</api>