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>
    <pages>
      <page pageid="49302" ns="6" title="Сурет:Aralsea.jpg" />
      <page pageid="49300" ns="6" title="Сурет:Dreams.metroeve encyclopedia-dreams-meaning.jpg" />
      <page pageid="49303" ns="6" title="Сурет:Korkyt.jpg" />
      <page pageid="49304" ns="6" title="Сурет:KorkytAta Memorial Karmakshi 04.jpg" />
      <page pageid="49306" ns="6" title="Сурет:Korkyt Ata mazar place 01.jpg" />
      <page pageid="49305" ns="6" title="Сурет:Qorqyt.jpg" />
      <page pageid="49299" ns="6" title="Сурет:Казахстан3.jpg" />
      <page pageid="49301" ns="6" title="Сурет:Тойқазан.jpg" />
    </pages>
  </query>
</api>