Just copy and paste it, and the there will no link copied with the words, because in websites, in most cases, HTML is used to embed the link with the text on a website. When you copy it to the a2k type box, only the words will be copied and paste, but not the link. But if you want to link the text, you have to do the url format [url=""][/url]
For example if you go to youtube and copy such words:
As you can see, there is no links attached to it. But if you go to the youtube website
and press those words on the top right hand corner, it'll take you to a new link.