How to update reordenated menu items in DB

[eluser]Rubiz'[/eluser]
Good night all.

My clients ( they really sucks ), want have a possibility to reorder the main site menu, and submenu.

Ok.

I added a column in DB called show_order, and got this jquery link http://dev.jquery.com/view/tags/ui/lates...i.sortable.

Than, I serialized the list itens and send organized to form inputs called session[], so I have all items organized perfectly.

My doubt is about how to update existent show_order in DB...

If I have first:
1
2
3
4
5

Than the client changes it to:
2
4
5
3
1

...

Cant think a way to update database with it...

Any idea?