how do i add value="1" to current li with wp_list_pages

In my template on my wordpress i have a css menu slider but the pages are listed using the wordpress function wp_list_pages

i need to add value="1" to the current page that the user is on when im using wp_list_pages, whats the best way to do this?

the current code i am using is-

<?php wp_list_pages('sort_column=menu_order&开发者_运维知识库depth=1&title_li=');?>

wp_list_pages() adds a class named current_page_item. You can use this class to style current page item. See here for more details - http://codex.wordpress.org/Function_Reference/wp_list_pages