Events Manager - Search/filter but custom attribute (field) v.03

gistfile1.php

add_action('em_template_events_search_form_ddm', 'my_em_styles_search_form');
function my_em_styles_search_form(){
$custom_attrs = get_meta_values('Hosted_by','Event');
?>
  <!-- START Styles Search -->
	<select name="host">
		<option value=''>All Styles</option> 
		<?php foreach($custom_attrs as $meta_name): ?>
		 <option value="<?php echo $meta_name; ?>" <?php echo ($_GET['host'] == $meta_name) ? 'selected="selected"':''; ?>><?php echo $meta_name; ?></option>
		<?php endforeach; ?>
	</select>
	<!-- END Styles Search -->
<?php
} 
function get_meta_values( $key = '', $type = 'post', $status = 'publish' ) {
    global $wpdb;
    if( empty( $key )){
        return;
        }
        $r = $wpdb->get_col( $wpdb->prepare( "
        SELECT DISTINCT pm.meta_value FROM {$wpdb->postmeta} pm
        LEFT JOIN {$wpdb->posts} p ON p.ID = pm.post_id
        WHERE pm.meta_key = '%s' 
        AND p.post_status = '%s' 
        AND p.post_type = '%s' 
    ", $key, $status, $type ) );
    return $r;
}
?>
<?php

add_filter('em_events_get_default_search','my_em_hosts_get_default_search',1,2);
function my_em_hosts_get_default_search($searches, $array){
	if( !empty($array['host']) ){
		$searches['host'] = $array['host'];
	}
	return $searches;
}

add_filter('em_events_get','my_em_hosts_events_get',1,2);
function my_em_hosts_events_get($events, $args){
	if( !empty($args['host'])  ){           
		foreach($events as $event_key => $EM_Event){
			if( $args['host'] != $EM_Event->event_attributes['Hosted_by']){          
				unset($events[$event_key]);
			}
		}
	}   
	return $events;
}