list child-pages as normal pages?

you can use get_pages() function, something like this:

$mypages = get_pages();
echo '<ul>';
foreach($mypages as $page){     
    echo '<li class="page_item page-item-'.$page->ID.'"><a href="'.get_page_link($page->ID).'">'.$page->post_title.'</a></li>';
}
echo '</ul>';