Wordpress Custom Post Type: Add Order column in admin list page

gistfile1.txt

add_filter('manage_$post_type_posts_columns', 'set_$post_type_columns');
function set_$post_type_columns($columns) {
    $columns['order'] = 'Order';
    return $columns;
}
add_action('manage_$post_type_posts_custom_column',  'set_$post_type_show_columns');
function set_$post_type_show_columns($name) {
    global $post;
    switch ($name) {
        case 'order':
            $views = $post->menu_order;
            echo $views;
    }
}

function set_$post_type_order_column_sortable($columns){
  $columns['order'] = 'menu_order';
  return $columns;
}
add_filter('manage_edit-$post_type_sortable_columns','set_$post_type_order_column_sortable');

/* Sort posts in wp_list_table by column in ascending or descending order. */
function set_disease_default_order($query){
    /* 
        Set post types.
        _builtin => true returns WordPress default post types. 
        _builtin => false returns custom registered post types. 
    */
    $post_types = get_post_types(array('_builtin' => false), 'names');
	$post_type = $query->get('post_type');
	
	if(in_array('disease', $post_types) && $post_type == 'disease'){

	if($query->get('orderby') == ''){
            $query->set('orderby', 'menu_order');
        }
	    if($query->get('order') == ''){
            $query->set('order', 'ASC');
        }
	
	}


	
}
if(is_admin()){
    add_action('pre_get_posts', 'set_disease_default_order');
}