Create a menu item in backend

Steps to create a menu item:

src\MisBundle\Resources\config\oro\navigation.yml

navigation:
    menu_config:
        items:
            scicom_tab:
                label: Scicom
                uri:   '#'
                extras:
                    position: 300
            scicom_tab_link:
                label: Scicom Hello
                route: scicom_link
        tree:
            application_menu:
                children:
                    scicom_tab:
                        children:
                            scicom_tab_link: ~

    titles:
        scicom_link: Hello

src\MisBundle\Resources\config\oro\routing.yml

mis_bundle:
    resource:   "@MisBundle/Controller"
    type:       annotation
    prefix:     /mis

Remove file src\config\routing.yml or comment out the auto-generate lines from CLI php bin/console generate:bundle

src\MisBundle\Controller\DefaultController.php

<?php

namespace MisBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;

class DefaultController extends Controller
{
    /**
     * @Route("/hello", name="scicom_link")
     * @Template()
     */
    public function indexAction()
    {
        return array('name' => "John Doe");
    }
}

src\MisBundle\Resources\views\Default\index.html.twig

{% extends "OroUIBundle:Default:index.html.twig" %}
{% block content %}
     <h1>Hello, {{ name }}!</h1>
{% endblock content %}

Refresh Cache

kiat@win10 MINGW64 /d/Work/wamp64/www/oro/platform-application (master)
$ php bin/console cache:clear

 // Clearing the cache for the dev environment with debug
 // true

 [OK] Cache for the "dev" environment (debug=true) was successfully cleared.