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 garcontinue="Balestra_luccicante_di_Luminiel" />
  </query-continue>
  <query>
    <pages>
      <page pageid="106" ns="0" title="BTS" />
      <page pageid="68" ns="0" title="BTS Cavaliere gigante" />
      <page pageid="67" ns="0" title="BTS Chrysos" />
      <page pageid="65" ns="0" title="BTS Treekun" />
      <page pageid="5550" ns="0" title="Babbo Opossum (perla)" />
      <page pageid="2646" ns="0" title="Baccello di Pii spinoso veloce" />
      <page pageid="11265" ns="0" title="Baccello di fagioli" />
      <page pageid="740" ns="0" title="Bacchetta da rabdomante" />
      <page pageid="10716" ns="0" title="Baguette" />
      <page pageid="6299" ns="0" title="Balestra delle fate" />
    </pages>
  </query>
</api>