MobileController

<?php namespace App\Http\Controllers;

Use DB;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;

use App\Models\Event;

class MobileController extends Controller
{
    public function speakers($slug)
    {
        $event = Event::where('slug', '=', $slug)->firstOrFail();
        $qry = "SELECT * from View_complex";
        $users = DB::select($qry, [$event->id]);
        return view('layouts.mobilespeakers', ['event' => $event, 'speakers' => $users]);
    }
}

routes.php

$domainName = App::environment('local') ? "mydomain.local" : "mydomain.com";

Route::group(['domain' => "{eventid}.$domainName"], function () {
    Route::get('/mobile/', 'MobileController@eventindex');
    Route::get('/mobile/speakers', 'MobileController@speakers');
});

view.blade.php

# here we have a problem, the action command tries to figure out what url to build based on the controller. 
# the controller, takes 1 parameter,  but we don't pass that here.
# since we're using domain routing, we get the parameter as part of the domain name in the routes.php file.
<li>
 <a href="{{ action('MobileController@speakers' )  }}" >Speakers</a>
</li>