Edit the index.template .php of the default theme
Find this:
// Show the [home] button.
echo'
<td align="center" class="menubg' , $current_action == 'home' ? '2' : '' , '">
<a href="', $scripturl, '">' , $txt[103] , '[/url]
</td>';
if($settings['TPortal_front_type']!='boardindex')
// Show the [forum] button.
echo'
<td align="center" class="menubg' , $current_action == 'forum' ? '2' : '' , '">
<a href="', $scripturl, '?action=forum">'.$txt['tp-forum'].'[/url]
</td>'; // Show the [help] button.
echo'
<td align="center" class="menubg' , $current_action == 'help' ? '2' : '' , '">
<a href="', $scripturl, '?action=help">' , $txt[119] , '[/url]
</td>';
// How about the [search] button?
if ($context['allow_search'])
echo'
<td align="center" class="menubg' , $current_action == 'search' ? '2' : '' , '">
<a href="', $scripturl, '?action=search">' , $txt[182] , '[/url]
</td>';
// Is the user allowed to administrate at all? ([admin])
if ($context['allow_admin'])
echo'
<td align="center" class="menubg' , $current_action == 'admin' ? '2' : '' , '">
<a href="', $scripturl, '?action=admin">' , $txt[2] , '[/url]
Then make a copy like the one highlighted in red except change the places that say "forum" to (whatever you want). Ive done it this way. It is different on custom themes.This is for default theme only.
Make sure to back up the original file
