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>
    <allredirects arcontinue="Domain_Name_System|422" />
  </query-continue>
  <query>
    <allredirects>
      <r fromid="92" ns="0" title="BINコード" />
      <r fromid="719" ns="0" title="Basic Input/Output System" />
      <r fromid="862" ns="0" title="Burp Suite" />
      <r fromid="1220" ns="0" title="CVE-2014-0160 OpenSSL Heartbleed" />
      <r fromid="1221" ns="0" title="CVE-2014-3566 SSL 3.0 脆弱性 POODLE" />
      <r fromid="1131" ns="0" title="C言語" />
      <r fromid="1010" ns="0" title="Digital Signature Algorithm" />
      <r fromid="285" ns="0" title="DoS攻撃" />
      <r fromid="771" ns="0" title="DoS攻撃" />
      <r fromid="1202" ns="0" title="DoS攻撃" />
    </allredirects>
  </query>
</api>