gistfile1.txt

var a = [{
    id: 1
}, {
    id: 2
}];

var b = [{
    id: 1
}, {
    id: 2
}];

var c = [{
    id: 1,
    aID: 1,
    bID: 1
}, {
    id: 2,
    aID: 1,
    bID: 1
}];

var final = [{
  "id": 1,
  "b": [{"id": 1,"c": [{"id": 1},{"id": 2}]}, {"id": 2, "c": []}]
},
{
 "id": 2,
 "b": [{"id": 1,"c": []},{"id": 2,"c": []}]
}]