If you have previously recommended this thread, you should see a tick / check mark on the recommend button. Click the tick to undo the recommendation (the tick may appear to change to a cross as you do this.) If you added a comment with your recommendation, you will need to delete that from your facebook wall separately.
Hi AKINAC, it sounds like you've (perhaps inadvertently) downloaded a toolbar or "helper" that does that to words in your browser. The links are not coming from us. There are various toolbars / malware things that do this.