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="Bank_proffice.dll|2176" />
  </query-continue>
  <query>
    <pages>
      <page pageid="319" ns="0" title="Lista kluczy IntNetCenter" />
      <page pageid="581" ns="0" title="Biblioteki DLL do przelewów bankowych z programu Motława" />
      <page pageid="900" ns="0" title="Import wyciągów bankowych" />
      <page pageid="2324" ns="0" title="Klucze rejestru IntNetCenter według kategorii" />
    </pages>
  </query>
</api>