108552 Insert information- SEO

I am looking to have a link of links(or information) along the bottom of a lot of pages. It needs to come from a set page say eg: [login to view URL] . htm its needs to look like part of the page, for search engine [login to view URL] the engine sees it, it will look like part of the page-normal html I should be able to paste 1 line of text at the bottom of the page and it should paste the information from the eg page above. this means when I make changes to a single page, it will be reflected on all the pages with the link in it instantly, Please advise best way to do