change class with ng-class multiple

i'm early for angularjs.

i have some list, if i click one of list, popup will display. and after i chose option on popup, popup will close and background list will change. untill now it's work for only first list. ( i think )

and i got problem, when I click the second list, background first list change class to.

This samplemy work

How to change background one by one after click option popup? Please help me, Thanks in advance

angularjs
class
ionic-framework
ionic

Here is an updated plunker, your problem is that you have one scope "class" item for your 2 items.
I separate it to 2 different scope value class1 and class2 and I switch the chooseItem via showPopup, and when you close the popup, I update the class1 and class2 according the chooseItem.