Adding Yelp Social Icons to the site.

Hey folks,

I have added WPMUDEV Dashboard support now FYI...

I would like to add one more icon to the social icons on this site https://bitly.com/ . Note that the icons are both in the secondary nav as well as in the footer. I would like it to link to the Yelp page (opening in a new window): To this Yelp url (not the bitly but the url after you click and view): http://bit.ly/2acbVKo

How can we do this?