Found my solution, hope this helps someone in the future.
A more extensive readthrough of the manual's usercomment facility yielded this possibility (required some adaptation), this changes any address from:
<a href="http://www.oxygen-online.org/test/index.php?id=somenum&othervariable=72andahalf">link text here</a>
Into:
http://www.oxygen-online.org/test/index.php?id=somenum&othervariable=72andahalf
$text = str_replace("\"","",ereg_replace ("<a[^>]+href *= *([^ ]+)[^>]*>([^ ]+)</a>", "\\1", $text));
Many thanks,
ucbones