function manage_wp_theatre_prod_posts_custom_column($column_name, $post_id)
{
$production = new WPT_Production($post_id);
switch ($column_name) {
case 'thumbnail':
echo $production->thumbnail_html();
break;
case 'dates':
echo $production->dates() . '<br />';
echo $production->cities();
break;
}
}
