@ -114,7 +114,7 @@ class Collapse extends Widget
Html::addCssClass($options, 'panel-collapse collapse');
$headerToggle = Html::a($header, '#' . $id, [
'class' => 'accordion-toggle',
'class' => 'collapse-toggle',
'data-toggle' => 'collapse',
'data-parent' => '#' . $this->options['id']
]) . "\n";