[@robkk Moderator 11 years, 8 months ago]

download the forums.php file and insert it into your child theme in a folder called bbpress.

https://github.com/robkk/bbPress-Hierarchical-Forum-and-Category-Layout

you can also use Robin’s plugin , it has the same file inside the plugin and it gives you options to style your bbpress installation better.

https://wordpress.org/plugins/bbp-style-pack/