wordpress plugins do not show my html code that I customize

I customize a wordpress plugin and put there html code. When I try to run it, my php code working fine but my html not show up.

I try html code as

$title = ‘<h1 class=”location-name” itemprop=”name”>Holiday Hours</h1>’;
echo $title;
echo ‘<ul class=”location-hours”>’;

but this html code is not showing and other the php logics work fine.

Regards