Laravel go to external url?

Okay, this is so simple yet I don't know how to do it.

I use vhost that makes localhost/wamp/www/blog/public become blog.dev

sample:

<a href="stackoverflow.com">Stack Overflow</a>

expected result: go to stackoverflow.com

what it actually does: go to http://ift.tt/2ag5NxT

So, how should I do?

via Chebli Mohamed