Probably not the best way to solve this, but I was able to modify the code to look something like this:
<!-- PHP -->echo html_entity_decode($_forumrow_val['FORUM_DESC']);<!-- ENDPHP -->
I was able to determine the values of the variables with a backtrace:
var_dump(debug_backtrace());
Again, may not be the best solution, but hopefully it helps someone else that hits this snag.