all pages, posts, categories with title and ID

<?php
$all_pages = get_pages(); //lookup http://codex.wordpress.org/Function_Reference/get_pagesfor the parameters to get all pages
if($pages) :
echo '<ul>';
foreach( $all_pages as $page ) {
echo '<li>';
echo $page->post_title.' - '.$page->ID;
echo '</li>';
}
echo '</ul>';
endif;

$all_posts = get_posts(); //lookup http://codex.wordpress.org/Template_Tags/get_posts for the parameters to get all posts
if($posts) :
echo '<ul>';
foreach( $all_posts as $post ) {
echo '<li>';
echo $post->post_title.' - '.$post->ID;
echo '</li>';
}
echo '</ul>';
endif;

$all_cats = get_categories(); // http://codex.wordpress.org/Function_Reference/get_categories
if($all_cats) :
echo '<ul>';
foreach( $all_cats as $cat ) {
echo '<li>';
echo $cat->name.' - '.$cat->term_id;
echo '</li>';
}
echo '</ul>';
endif;