Hi PeterErnhard,
The nofollow tag basically instructs crawlers on which links to ignore and not give credit for to sites that you link to. Google will simply drop those link from their link graph and their discovery process.
The answer for you depends on a couple of things:
1) Are all the links you want to append the nofollow tag to on the same page
2) These are the only links on the page?
If both of the above are true, you can simply append a robots meta tag as below to achieve the same result as an individual nofollow tag on each link
If instead, you are looking to show users one thing and then hide the nofollow behind something else so that only crawlers will see it, its not going to work.
For the crawlers to recognize the nofollow, it needs to be on each individual link
Hope this helps
MGandhi
