Property Hive - Make property type multiselect

snippet.php

add_action('wp_footer', function () {
    ?>
    <script>
    jQuery(function ($) {

        $(document).on('ph:toggleSearchDepartment', function () {
          $('#property_type')
              .attr('multiple', true)
              .attr('name', 'property_type[]');
        });

    });
    </script>
    <?php
});