This is a super old thread, but I thought I’d post a solution that I used to get by the issue of having to choose a parent forum, when creating a new forum, on the front end of the site.
In my case I just need to default to “NO PARENT” and will never want a user choosing a parent forum when creating a forum. So…
First, put a copy of “form-forum.php” into your child theme (childtheme/bbpress/form-forum.php).
Within form-forum.php, scroll down to the Parent Form label, which has an id of “bbp_forum_parent_id”.
You can comment out then entire bbp_dropdown function and then add an html input field with same name, id and a value of -1.
<input type=”hidden” name=”bbp_forum_parent_id” id=”bbp_forum_parent_id” value=”-1″>
The key part being the value of “-1”
Hope that helps someone!
