No one? Or i am totally on the wrong way?

Let's say your $location is an array and your controller code looks like this:

public function getEdit($id){
    $location = Location::find($id);
    return View::make('locations.edit')->with('location',array(
        'name' => $location->name
    ));

}

Then, your form should look like this:

<div class="form-group control-group">
    {{ Form::label('Location[slug]', 'Slug',array('class' => 'control-label'))  }}
    <div class="controls">
        {{ Form::text('Location[slug]', $name, array('class' => 'form-control')) }}
    </div>
</div>

The text method accepts 3 parameters:

1. The input type
2. The input value
3. Array of other options

You have set your value to null

Hope this helps