test.js

/// router
define(
['backbone'],
function (backbone) {
  var router = new backbone.Router;

  return {
    route: function (uri, name, handler) {
      router.route(uri, name, handler);
    },
    navigate: function (uri, options) {
      router.navigate(uri, options);
    },
    start: function () {
      backbone.history.start({pushState: true});
    }
  };
});


////// site ctrl

define(
['backbone', 'underscore', 'jquery', 'router', './views/home'],
function (backbone, _, $, router, homeView) {

  var activeView = null;

  var render = function (view) {
    activeView && activeView.off();
    activeView = view;
    activeView.render();
  }

  return {
    home: function () {
      render(homeView);
    },

    about: function () {

    },

    contact: function () {

    },

    start: function () {
      router.route('/home', 'home', this.home)
      router.route('/about', 'about', this.about)
      router.route('/contact', 'contact', this.contact)  
    }
  }

})

//// main
requirejs(
  ['site', 'router'],
  function (site, router) {
    site.start();
    router.start();
    router.navigate('home', {trigger: true});
  }
);