/json/getmenu?restaurantid=1

gistfile1.js

returns a json object with
{
  'response': 1 ,                 /* 1 for success */
  'menus': [list of menu objects]                     /* list of menu objects */
}


/*   Menu Object  */
{
  'name': "Menu Name",          
  'items': [list of item objects]                 /* list of item objects */
}


/*   Item Object */
{
  'name': "Item Name",
  'description' "Item Description",
  'price' "9.99",
  'itemid': "4509",
}

So to iterate it would be:

for (var m in data.menus){
  data.menus[m].name
  for (var i in data.menus[m].items){
    data.menus[m].items[i].name
    data.menus[m].items[i].description
    data.menus[m].items[i].price
    data.menus[m].items[i].itemid

  }
  
}