这应该可以做到。经过本地测试，效果良好。

// Hide \'included\' and \'not included\' custom meta fields 
// from the edit \'excursion\' post type page.
function my_exclude_custom_fields( $protected, $meta_key ) {

  if ( \'excursion\' == get_post_type() ) {

    if ( in_array( $meta_key, array( \'included\', \'not included\' ) ) ) {
      return true;
    }

  }

  return $protected;
}
add_filter( \'is_protected_meta\', \'my_exclude_custom_fields\', 10, 2 );

try this

add_filter(\'is_protected_meta\', \'my_is_protected_meta_filter5\', 10, 2);
function my_is_protected_meta_filter5($protected, $meta_key) {
    if ( in_array( $meta_key, array( \'para1\', \'para2\' ) ) ) {
        return true;
    }
        return $protected;
}