Hi I have two groups one is the state category the other is the state services. and I am trying to hide the duplicates for the state category

looks like this.


Selft Concept
Culture

Self Concept
Youth leadership

Academic Support
Large Group


I only need the State Categories to show up one time not every time there is a State services that relates to it, (hope that makes sense) when I went to the properties to hide the duplicates it didnt work. Is there another way to do that??