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>
    <allpages gapcontinue="お金を貯められるタイミングは人生で２回ある" />
  </query-continue>
  <query>
    <pages>
      <page pageid="111" ns="0" title="TAX FREEとDUTY FREEの違いは何か？" contentmodel="wikitext" pagelanguage="ja" touched="2016-01-28T14:57:20Z" lastrevid="305" counter="" length="726" new="" />
      <page pageid="72" ns="0" title="Yahoo!公金支払いで公共料金をクレジットカードで支払う" contentmodel="wikitext" pagelanguage="ja" touched="2015-08-06T15:11:43Z" lastrevid="156" counter="" length="5115" new="" />
      <page pageid="6" ns="0" title="e-Tax" contentmodel="wikitext" pagelanguage="ja" touched="2013-03-26T13:45:08Z" lastrevid="11" counter="" length="940" />
      <page pageid="100" ns="0" title="お金を増やす方法" contentmodel="wikitext" pagelanguage="ja" touched="2016-02-15T05:43:27Z" lastrevid="342" counter="" length="7051" />
    </pages>
  </query>
</api>