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_xml.dll" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="BANK OplatyBakowe" missing="" />
      <page ns="0" title="BANK PartnerRozmowZBankiem" missing="" />
      <page ns="0" title="Bank sepa.dll" missing="" />
      <page pageid="2809" ns="0" title="BO kasy na nastepny dzien" />
      <page pageid="2797" ns="0" title="Bank" />
      <page pageid="2310" ns="0" title="Bank kb24.dll" />
      <page pageid="2175" ns="0" title="Bank mt94x.dll" />
      <page pageid="2174" ns="0" title="Bank proffice.dll" />
      <page pageid="2458" ns="0" title="Bank proffice2.dll" />
      <page pageid="2194" ns="0" title="Bank wbk.dll" />
    </pages>
  </query>
</api>