68871 editing html script

Sorry, I posted something similiar recently but it looks like I didn't communicate the project too well. Trying again. thought I was after a cms, but actually what I'm really after is an easy way of editing my current html templates. I have a basic html site, which contains text menu links on the left hand side (this is common on all pages). My main problem is that when I need to add a new text menu, I would then have to edit 20 other html pages to make sure the same menu exist for all pages. This is too time consuming. CMS won't solve the problem because I don't want to still be editing 20 pages just because I made one little text change on the menus I need a script that would allow me to perhaps insert a centralised text menu (not fancy drop menu, just simple text link menus) into a the html and if I do decide to delete a menu or create a new link, I just need to change it in one centralized place, not all pages. This is like a very basic smarty templating system. all suggestions welcomed.