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 galcontinue="День_Науки_2013-2014_уч.год/ОБЩЕСТВОЗНАНИЕ_И_ПСИХОЛОГИЯ|4" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Заглавная страница" />
      <page pageid="3" ns="0" title="День Науки 2013-2014 уч.год" />
      <page pageid="4" ns="10" title="Шаблон:Сетевой проект:День Науки 2013-2014 уч.год/навигация" />
    </pages>
  </query>
</api>