Sort drop down Suburb A-Z

Can anyone help, please.

Thanks

function epl_remove_location_sort($sorters) {

	foreach($sorters as $key	=>	 &sorter) {
		if( in_array($sorter['id'], array('location_asc','location_desc') ) ) {
			unset($sorters[$key]);
		} 

	}

	return $sorters;
}
add_filter('epl_sorting_options','epl_remove_location_sort');

PLease try this

Thanks

Noticed an error in the PHP with the &sorter should be $sorter. Here is an update of the function

function epl_remove_location_sort($sorters) {

	foreach($sorters as $key	=>	 $sorter) {
		if( in_array($sorter['id'], array('location_asc','location_desc') ) ) {
			unset($sorters[$key]);
		}
	}
	return $sorters;
}
add_filter('epl_sorting_options','epl_remove_location_sort');