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="Enable_Hardware_Unit_Ssd_Caching|352" />
  </query-continue>
  <query>
    <allredirects>
      <r fromid="2725" ns="0" title="CLI Guide Overview" />
      <r fromid="2701" ns="0" title="Call-home / Alerting" />
      <r fromid="2700" ns="0" title="Cloud Containers / NAS Gateway" />
      <r fromid="1518" ns="0" title="Clustered HA SAN/NAS Solutions using ZFS" />
      <r fromid="1327" ns="0" title="Clustered HA SAN/NAS with JBOD back-end Administrators Guide" />
      <r fromid="1328" ns="0" title="Clustered HA SAN/NAS with iSCSI/FC SAN back-end Administrators Guide" />
      <r fromid="3110" ns="0" title="Configure QuantaStor NAS Gateway Server" />
      <r fromid="3108" ns="0" title="Configure QuantaStor SAN/NAS Server" />
      <r fromid="3112" ns="0" title="Configure Scale-out Storage Cluster" />
      <r fromid="2748" ns="0" title="EULA" />
    </allredirects>
  </query>
</api>