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="68" ns="0" title="Test page" />
      <page pageid="69" ns="0" title="Kako izraditi novi e-mail (i podesiti isti)?" />
      <page pageid="71" ns="0" title="Konfiguracije čitanja e-maila preko webmaila?" />
      <page pageid="73" ns="0" title="Kako izraditi novi FTP račun?" />
      <page pageid="77" ns="0" title="Što je to tajni (autorizacijski) kod (domain (transfer) secret or authorization (auth) code) i kako ga dobiti?" />
      <page pageid="78" ns="0" title="Koji je postupak za transfer domene?" />
      <page pageid="79" ns="0" title="Kako izraditi bazu podataka (i korisnike)?" />
    </pages>
  </query>
</api>