I'm not sure I understand the question. Why would you need to lock a link? If you're talking about adding a link to a template so that when you put it online, others cannot take the link off, then yes there are ways to do this I believe. However I wouldn't start hiding links, Google won't like that.
I have added a new page to the website with some back up files on it and I dont want anybody to be able to open the new page thatb was why I was looking to hide the link to the new page or lock the link. Is there a way of doing this. I anm using Adobe Contribute CS5
This thread should be moved to "search engine optimization" section. To answer OP : Why do you want to hide those links really? If you do not want them then they should not be listed in the first place. In case you want to exchange link but not want to giving link out while being given back then it would be a dirty trick. You can hide those link by using css + java but it would hurt your ranking when Google found out.