How to list contacts this way on the sidebar?

Admission (goes to Sindy Udell)

Early Childhood (goes to Melissa Davis)

Elementary School (goes to Arielle Derby)

Middle School (goes to Lisa Schopf)

Head of School (goes to Naomi Reem)

Volunteering (goes to Laurie Brumberg)

Media and Communication (goes to Ronit Greenstein)

Giving (goes to Joshua Suchoff)

Other (goes to Ronit Greenstein)