Laravel 5 - set route() function in config file

I have config file named sidebar.php I keep there menu's urls.

How to place route() function in that config file?

That is the structure:

    return [

        'menu' => [[
            'icon' => 'fa fa-th-large',
            'title' => 'Home',
            'url' => route('home.dashboard')
        ]]
    ]

The line 'url' => route('home.dashboard') causes error 500.

That solution will not work:

return [
    'url' => 'admin.index',
]

via Chebli Mohamed