PHP code in WordPress pages in posts

I wanted to make a page with a list of all categories listed in alphabetical order. With the help of your plugin I did just fine.

<?php wp_list_cats('sort_column=name&sort_order=asc'); ?> worked

but <?php the_tags(); ?> doesn’t work,
neither <?php the_tags('<ul><li>','</li><li>','</li></ul>'); ?>

<?php the_time('l, F jS, Y') ?> and <?php echo '<p>Hello World</p>'; ?> – works too ??

but no success for the tags code…

Any ideas?

Thank you for the plugin, hope for further development.