Our forums are installed on a subdomain

forum.hpathy.com

The wp page used to diaplay forums is ‘forum’

This leads to url’s like

“http://forum.hpathy.com/forum/problem-with-post-edit-buttonomeopathic-discussion/”

for the forums

and 

“http://forum.hpathy.com/forum/problem-with-post-edit-buttonomeopathic-discussion/problem-with-post-edit-buttonpathy-forum-rules-read-first/”

for topics

I would like to get rid of the trailing ‘forum’ in the url’s so that url appears like

“http://forum.hpathy.com/problem-with-post-edit-buttonomeopathic-discussion/”

“http://forum.hpathy.com/problem-with-post-edit-buttonomeopathic-discussion/problem-with-post-edit-buttonpathy-forum-rules-read-first/”

How can I achieve this?

Thank you.