Removing Category From Topic Title

[X-Name]

Hello,

I want to remove forum name from topic title in meta.For example if a topic is in "Wordpress" category will have the name "Best Wordpress Themes - Wordpress".

This is the code im using right now:

$extra_title = ($start > 0) ? ' - ' . $user->lang['Page'] . ( floor( ($start / $config['posts_per_page']) ) + 1 ) : '';
page_header($topic_data['topic_title'] . ' : ' .  $topic_data['forum_name'] . $extra_title);

I know that this code is the problem : ' . $topic_data['forum_name'] but i can't remove it without errors.


Tried also:

page_header($topic_data['topic_title']);

but will not display the page number if the topic has more pages (Topic Name - Page X)

Any help will be appreciated.
Thanks.