{{ Form::model($user, array('method' => 'put', 'action' => array('user.update', $user->id))) }}
   <div class="form-group">
   	   {{ Form::label('username','Username') }}
   	   {{ Form::text('username',null,['class' => 'col-sm-2 form-control']) }}
   </div>
   <div class="form-group">
   	   {{ Form::label('password','Password') }}
   	   {{ Form::password('password',['class' => 'col-sm-2 form-control']) }}
   </div>
   <div class="form-group">
   	   {{ Form::submit('Create user',['class' => 'btn btn-primary']) }}
   </div>
{{ Form::close() }}

UserController.php

public function update($id)
	{
		$user = User::find($id);
		$user->fill(Input::all());
		$user->save();

		return Redirect::to('/');
	}

routes.php

Route::resource('user','UserController');