I think I would do this just like what tony said, to just directly concatenate it to all of them then echo it in one go, all of the links. After you do the sanitation on both variables that is. I mean im assuming theres like a hundred or something of em, the links.

I have read somewhere that echoing something is slower than directly outputting it outside of php, but as for what Salanthe was asking, I have no idea how much the difference is. I think I said something similar somewhere and was answered that the difference was miniscule or something that it wont matter that much.