I'm assuming the Arab/Arab1/Arab2 are the three measures for "Arab". (For the record, [Arab World] is empty.)
I did it two different ways. In the first workbook I pivoted all those measures, and then I can select [Pivot Field Names] in a filter. (You can change the name of the two columns that get made by a pivot.)
In the second workbook I just used MeasureNames/MeasureValues to control what gets displayed.