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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20150410122948" timestamp="2015-04-10T12:29:48Z" ns="0" title="Hlavní strana" />
        <page value="20150410142537" timestamp="2015-04-10T14:25:37Z" ns="0" title="Role" />
        <page value="20150410150743" timestamp="2015-04-10T15:07:43Z" ns="0" title="Nastavení funkčnosti" />
        <page value="20150503161528" timestamp="2015-05-03T16:15:28Z" ns="0" title="Hromadné výstupy" />
        <page value="20150503165143" timestamp="2015-05-03T16:51:43Z" ns="0" title="Harmonogram provozu" />
        <page value="20150503171333" timestamp="2015-05-03T17:13:33Z" ns="0" title="Harmonogramy - automatické odesílání" />
        <page value="20150504145038" timestamp="2015-05-04T14:50:38Z" ns="0" title="Deaktivace GCOMu" />
        <page value="20150504150054" timestamp="2015-05-04T15:00:54Z" ns="0" title="Skupiny" />
        <page value="20150520141135" timestamp="2015-05-20T14:11:35Z" ns="0" title="Uživatelské nastavení" />
        <page value="20150520142017" timestamp="2015-05-20T14:20:17Z" ns="0" title="Nejčastější dotazy" />
      </results>
    </querypage>
  </query>
</api>