[groups] redesigned it.

static/scripts/app/collections/groups.js

@@ -0,0 +1,21 @@
+define([
+    'underscore',
+    'backbone',
+    'common',
+    'app/models/group'
+], function(_, Backbone, Common, Group) {
+    'use strict';
+
+    var GroupCollection = Backbone.Collection.extend({
+        model: Group,
+        comparator: function(a, b) {
+            return Common.compareTwoWord(a.get('name'), b.get('name'));
+        },
+
+        url: function() {
+            return Common.getUrl({name: 'groups'});
+        }
+    });
+
+    return GroupCollection;
+});