Excluding Pages in Nav Bar

I know the code to exclude pages but when I put the code in my whole site disapears. this is what the code looks like without the exclude.

<div id=”header”>

<h1>” href=”<?php bloginfo(‘url’); ?>”><?php bloginfo(‘name’); ?></h1>
</div>

<div id=”menu”>

<li <?php if (is_home()) { ?>id=”current” <?php } ?>>“>Home
<?php wp_list_pages (‘sort_column=menu_order&title_li=’); ?>

</div>