Yep, although instead of using webedens basic text you'll have to use a html snippet. IE: <a title="your tags here, separated by commas"href="http://yoursite.com/shop/46525xxx>shop</a>

If you want this to be available for when people click buttons, just put the text as spaces like that, and resize the html snippet so it is spaced over the button. This will lose the roll over effect on buttons though.

The way to use this is the implement a your-site-only search, search for say "diy", and add all pages in the result as links to your page.. otherwise I can't see a way, webeden is more for common features. You could do this like any other website by using a large html snippet covering the page and adding a load of scripts, but otherwise its best done manually or not at all.

Not sure I understood 100% so will explain again. Suppose I have a piece of information that includes a piece of text and a link to a website. Now, I would like to assign that piece of information to several catagories, which will be buttons/pages, for example 'British', 'Newspaper' and 'Religion'. So that when someone clicks on either one of these three buttons, they will get that same piece of information, without me having to copy it three times into those pages. How do I do that?

Doesn't seem possible, I'm afraid. Its best not to duplicate content at the end of the day from a search-engine ranking perspective either way.

you can copy a page and then slightly alter it to your needs, hope that helps.