editing sidebar headings

Hello!

I would like to rename some of the default headings (‘pages’, ‘categories’, ‘archive’, etc) in my sidebar.

I’ve opened the sidebar.php file but not sure of what to edit there is not the usual <h3>Title</h3> it look like this:-

<li id="pages">
				<h3><?php _e('Pages', 'sandbox') ?></h3>
				<ul>
<?php wp_list_pages('title_li=&sort_column=post_title' ) ?>
				</ul>
			</li>

			<li id="categories">
				<h3><?php _e('Categories', 'sandbox'); ?></h3>
				<ul>
<?php wp_list_cats('sort_column=name&hierarchical=1') ?>

How do I edit the headings?

cheers!