Mustache template string inside render as HTML
From the Mustache documentation:
All variables are HTML escaped by default. If you want to return unescaped HTML, use the triple mustache: {{{name}}}.
So you just have to use eg.{{{content}}} in your template:
<div id="box"> <div id="title"> {{title}} </div> <div id="content"> {{{content}}} </div> <div id="footer"> {{footer}} </div> </div>