Make the application modular to have a "main" and "backend" part.

app/modules/Base.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Module;
+
+use Phalcon\Loader,
+    Phalcon\DiInterface,
+    Phalcon\Mvc\Dispatcher,
+    Phalcon\Mvc\ModuleDefinitionInterface;
+
+abstract class Base implements ModuleDefinitionInterface
+{
+    protected $_controllerPath;
+
+    protected $_controllerNamespace;
+
+    protected $_viewDir;
+
+    /**
+     * Register a specific autoloader for the module
+     */
+    public function registerAutoloaders(DiInterface $di = null)
+    {
+        $loader = new Loader();
+
+        $loader->registerNamespaces([
+            $this->_controllerNamespace => $this->_controllerPath,
+        ]);
+
+        $loader->register();
+    }
+
+    /**
+     * Register specific services for the module
+     */
+    public function registerServices(DiInterface $di)
+    {
+        $dispatcher = $di->get('dispatcher');
+
+        $dispatcher->setDefaultNamespace($this->_controllerNamespace);
+
+        $di->get('view')->setViewsDir(array_merge(
+            [ $this->_viewDir ],
+            (array) $di->get('view')->getViewsDir()
+        ));
+    }
+}
+