How to remove prefix in navigation bar

[SvePu]

You can do this by modifying the core file "showthread.php".

Search in showthread.php for...

$thread['displayprefix'] = $threadprefix['displaystyle'].' ';

...and uncomment this part, like

//$thread['displayprefix'] = $threadprefix['displaystyle'].' ';

But be prepared that these changes could be overwritten on a following MyBB update.