Migrate Kohana to Laravel

In kohana bootstrap I have the following configuration

Kohana::init(array(
    'base_url'  => 'myapp',
));

How do I migrate to Laravel?

Because in Laravel I have the following url www.example.com/myapp/ and I can not get the css at www.example.com/myapp/css/app.css

{{url("/")}} always prints www.example.com and www.example.com/myapp /

I do not know where to setup this in Laravel