get_plugin_slug();
$event_name = Arlo_For_Wordpress::$post_types['event']['singular_name'];
// output the widget title
$title = apply_filters( 'widget_title', empty( $instance['title'] ) ? $event_name . ' ' . __( 'Categories', $plugin_slug ) : $instance['title'], $instance, $this->id_base );
echo $before_title . $title . $after_title;
// number of levels to display, "0" displays the full tree
$depth = isset($instance['depth']) ? $instance['depth'] : 0 ;
$parent = ($instance['parent']) ? '' : ' parent="0"';
$shortcode = '[arlo_categories' . $parent . ' depth="' . $depth . '" widget="true"]';
$output = do_shortcode($shortcode);
if (!empty($output)) {
$output = '' . $output . '
';
} else {
$output = '' . __('No categories to display.', $plugin_slug) . '
';
}
// output the events list
echo $output;