Adding events tag to search form

/*
 Adding events tag to search form
 - create php file and folders under wp-contents/themes/your
   -> wp-content/themes/Your Theme/plugins/events-manager/templates/search/categories.php
 - copy the contents from wp-contents/plugins/events-manager/templates/templates/search/categories.php
 - add the snippet below at the bottom of the file or below the events categories section
 */

<label>Event tags </label>
<?php
	$selected = !empty($_REQUEST['search-tag']) ? $_REQUEST['search-tag'] : 0;
	wp_dropdown_categories(array( 'hide_empty' => 0, 'name' => 'tag', 'hierarchical' => true, 'taxonomy' => EM_TAXONOMY_TAG, 'selected' => $selected, 'show_option_none' => 'Event Tags', 'class'=>'em-events-search-tag', 'orderby' =>'name'));
?>