How to Define rel=nofollow Attribute for External Links?

[CommercePundit]

I want to define rel=nofollow attribute for Vista Patio Umbrellas. I have designed narrow by search section on home page. I want to define rel=nofollow attribute for all text links which are available in left navigation. So, what is best solution for that?

[SuperlativB]

make it look like this<a href="" rel="nofollow"></a>

[Bartell]

For example (add what is in bold):

• rel="nofollow">$0.00 - $100.00

You can also delete the empty title attribute (title="") since it's pretty useless.

[CommercePundit]

I know about code structure and how to write down in code! I have question with different manner. Can I add nofollow attribute for internal links. If yes so, How can I justify link whether I add nofollow attribute or not...