$(function () {
    // Set shown event handler function
    $(".selector").wijmenu({
        shown : function (event, item) {
     
        }
    });
});

shown = function ( 
   event : any,
   item : any
) { };

Parameters

event

This is the jQuery.Event object.

item

The wijmenu widget object when the menu has been displayed, or the wijmenuitem widget when the submenu has been displayed.

Reference

options type
wijmenu jQuery Widget