{{ strtoupper(__('app.url')) }} {!! Form::text('config[override_url]', (isset($item) && isset($item->getconfig()->override_url) ? $item->getconfig()->override_url : null), array('placeholder' => __('app.apps.override'), 'id' => 'override_url', 'class' => 'form-control')) !!}

{{ __('app.apps.username') }} {!! Form::text('config[username]', (isset($item) && isset($item->getconfig()->username) ? $item->getconfig()->username : null), array('placeholder' => __('app.apps.username'), 'data-config' => 'username', 'class' => 'form-control config-item')) !!}

{{ __('app.apps.password') }} {!! Form::text('config[password]', (isset($item) && isset($item->getconfig()->password) ? $item->getconfig()->password : null), array('placeholder' => __('app.apps.password'), 'data-config' => 'password', 'class' => 'form-control config-item')) !!}

Test