You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <allusers>
      <u name="不争不辩" />
      <u name="大漠孤狼" />
      <u name="大象无形" />
      <u name="天意" />
      <u name="淡淡伊" />
      <u name="淡淡伊" />
    </allusers>
  </query>
</api>