Read this sticky in the gd forum
Some websites are “trusted” by Blizz, like their own and YouTube, and you don’t need to do anything funny for those.
Some people have earned “trust level 3” and don’t need to do anything funny either.
But for the rest of us, you need to format the link as “code”
use the code tags
[code]www.somewebsite.com[/code]
or with “backticks”
`www.somewebsite.com`