Hi Prashant---
If all you really want is to get rid of the spelling corrections that Arbortext adds to the menu, you can do that by turning off interactive spell checking with the following command (which you could add to the code called by your menu item):
set spellinteractive=off;
That will turn off the wavy red lines for misspelled words, and stop Arbortext from adding its suggestions to the context menu. Then you can add your own suggestions or other options in the usual way via menu_add :Edit:Popup. ...
--Clay