Thanks, it work perfect. Is good to have a way to fill the array directly from Designer 
I currently do it from Graph, i create a function in order to use minimal space inside Event Graph, spawn all Vars + Make Array node and link all. From Event Graph just call the function that return the array. I like comments to arrange Var groups inside function, and made maintenance a bit more clear and fast that just a list, especially if UI becomes big. For example delete several vars at the same time.
But both ways require manually maintenance beyond TextBlock element in Designer, that is a waste of time. We can’t take profit from category ? Is only a stetical element in Blueprints ?
Hope there are one way to iterate class, like we can do in C++, to find Property based on meta data filter, and automaticaly create array of vars from the selected category.
The goal is to made it easy like C++, just select inside TextBlock element Details the custom category, and thats all ! the Graph node do the work 
We can modify the UI TextBlock elements, add, delete, change names, tree position, no matter… after compile array updated automatically.
If the UI comes big, iterate over class becomes necessary. Hope someone know how to do it, or Epic make this useful node in future version of Editor, regards.