Change the forum ID number for the forum here f=?

[bluidkiti]

I have an old forum that has had forums deleted off of it. Now the forums do not run in numerical order. Example below of what you may now have:
http://www.yourforum.com/forums/forumdisplay.php?f=1
http://www.yourforum.com/forums/forumdisplay.php?f=3
http://www.yourforum.com/forums/forumdisplay.php?f=4
http://www.yourforum.com/forums/forumdisplay.php?f=8
http://www.yourforum.com/forums/forumdisplay.php?f=10
and so on and so forth instead of:
http://www.yourforum.com/forums/forumdisplay.php?f=1
http://www.yourforum.com/forums/forumdisplay.php?f=2
http://www.yourforum.com/forums/forumdisplay.php?f=3
http://www.yourforum.com/forums/forumdisplay.php?f=4
http://www.yourforum.com/forums/forumdisplay.php?f=5
because you have deleted forums in the past.

Is there a way to change the forum ID number of the forums in the first group so you can once again have the forums in numerical order like the last group?

The real question I have is: Is there a way to change the 10 in this link http://www.yourforum.com/forums/forumdisplay.php?f=10 to a 5 so it reads http://www.yourforum.com/forums/forumdisplay.php?f=5?