I can tell Blogger is makin' changes, especially since the last time I linked other websites/blogspots to my daily post. I had a hard time last night trying to find the new html codes for adding links. I would like to help you find "How To" by giving you the Blogger article right at your fingertips and not having to dig every update article from Blogger. Here it is and it's very simple. Just make sure you delete the words: http://, URL and TEXT. You need to delete one of the http:// because you will end up with two and it won't work this way.
I hope this helps you out. Happy blogging!