gistfile1.js

app.SettingsView = Marionette.ItemView.extend({
	// ...
	initialize: function() {
		this.whitelist = new app.TopicsWhitelist();
	},

	ui: {
		'topics': '#topics .checkboxes'
	},

	onRender: function() {
		var topics = this.whitelist.render().el;
		this.ui.topics.html(topics);
	}
});

app.TopicsWhitelist = Backbone.View.extend({
	tagName: 'ul',

	initialize: function() {
		this.topics = new app.Topics();
		this.listenTo(this.topics, 'reset', this.reset);
		this.fetch();
	},

	reset: function() {
		app.Options.vent.trigger('topics:ready');
	},

	render: function() {
		this.$el.append(this.topics.map(function(topic) {
			return new app.TopicView({ model: topic }).render().el;
		}));

		return this;
	}
});