I am sorry. My experience with PHP is not good.
My problem is :
I want to style collapse Widget.
(Demo: https://getbootstrap.com/javascript/#collapse)
Collapse only can run if href and id have the same value in one widget
And they must have different value in the different widgets
(Example : In first widget they have same value is random1, in second widget they have value random2 )
(You can see from this URL https://s28.postimg.org/72pjqa5ul/Untitled_1.png )
I want to solve it by random id of widget (%1$s), but it don’t work.
Do you have any suggestions for me ? Thank you very much !