I want the following string to be output in html with the proper tags, but the output of the page shows <b>topicname</b><br>. How do I do this correctly?
If you're sure $catstr and $topicname are properly encoded for HTML you can use <send $ret>. Otherwise use strfmt with %H to make sure they are encoded.
<strfmt "%H<b>%H</b><br>" $catstr $topicname>