Jump Menu Dillema

I got a website here
which I have used a lot of jump menu.

Now the problem is… I would like to add some pages more inside the website and I have to edit every jump menu in every pages in the website.

Is there any better way to edit the Jump Menu so that I can have the changes in just one touch… something like remote Jump Menu…

Can anybody here teach me or show me the tutorial for this kind of thing?