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>
    <alllinks galcontinue="OpenWRT" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="BGP" missing="" />
      <page ns="0" title="Como editar este wiki" missing="" />
      <page ns="0" title="Enlaces ponto a ponto" missing="" />
      <page ns="0" title="Listado de routers segundo as segundo as condições mais adequadas" missing="" />
      <page ns="0" title="Misturar mesh e infra-estrutura" missing="" />
      <page ns="0" title="Modo ad-hoc" missing="" />
      <page ns="0" title="OSPF" missing="" />
      <page pageid="6" ns="0" title="Como iniciar una ilha do princípio" />
      <page pageid="3" ns="0" title="Instalação de Libre-mesh em TP-Link WDR" />
      <page pageid="17" ns="0" title="Materiais" />
    </pages>
  </query>
</api>