This is my full code and where I pasted it
<?php echo $args['before_widget'];
if (!empty($instance['title'])) {
echo $args['before_title'] . $instance['title'] . $args['after_title'];
}
do_action('mptt_widget_upcoming_before_content', $events);
$time_format = get_option('time_format');
$events_group_by_categories = array();
foreach ($events as $event) {
if (!isset($temp[$event->column_id])) {
$events_group_by_categories[$event->column_id][] = $event;
} else {
$events_group_by_categories[$event->column_id][] = $event;
}
}
if (!empty($events)): ?>
<?php foreach ($events_group_by_categories as $key_category => $cat_events) { ?>
<ul>
<?php foreach ($cat_events as $key => $event):
$event_class = 'event';
?>
<li class="<?php echo apply_filters('mptt_widget_upcoming_event_class', $event_class) ?>">
<?php
$disable_url = (bool)$event->post->timetable_disable_url || (bool)$instance['disable_url'];
$url = ($instance['custom_url'] != "") ? $instance['custom_url'] : (($event->post->timetable_custom_url != "") ? $event->post->timetable_custom_url : get_permalink($event->event_id));
if (!$disable_url) { ?>
<a href="<?php echo $url ?>" title="<?php echo get_the_title($event->event_id) ?>" class="event-link">
<?php }
echo get_the_title($event->event_id);
if (!$disable_url) { ?>
</a><br/>
<?php } ?>
<span class="post-date">
<?php if ($instance['view_settings'] !== 'today' && $instance['view_settings'] !== 'current'): ?><?php echo get_the_title($event->column_id) ?>
<br/>
<?php endif; ?>
<time datetime="<?php echo $event->event_start; ?>" class="timeslot-start"><?php echo date($time_format, strtotime($event->event_start)); ?></time>
<?php echo apply_filters('mptt_timeslot_delimiter', ' - '); ?>
<time datetime="<?php echo $event->event_end; ?>" class="timeslot-end"><?php echo date($time_format, strtotime($event->event_end)); ?></time>
</span>
<span class="event-description"><?php echo $event->description; ?></span>
</li>
<?php endforeach; ?>
</ul>
<?php
}
else:
_e('no events found', 'mp-timetable');
endif;
do_action('mptt_widget_upcoming_after_content', $events);
echo $args['after_widget'] ?>