wdDoModifyView() to modify Context Value mapped to WD component

How to modify Component (Dropdown , RadioButtonGroupByKey) during runtime in wdDoModifyView() to manipulate the list of Values mapped from Context element?

For Example : Context Node Element has a value List {1,2,3,4,5,....} , but allow only value{1,3,6,..} to map .

Please let me know , if some one has the code.

Thanks