wp_list_pages hierarchical=0 shows hierarchy

[michaelh]

Using the hierarchical=0 with wp_list_pages still causes the hierarchy to display.

Both these produce same result:

wp_list_pages('hierarchical=0&title_li=<h2>Pages</h2>' );
wp_list_pages('hierarchical=1&title_li=<h2>Pages</h2>' );

Seems to be broken as least far back as 2.5.1, if not before.

Note that hierarchical=0 works with wp_list_categories.

Reported in Codex by Dnusim

wp_list_pages always sets hierarchical to "0" when it calls get_pages, because hierarchical wouldn't work with the "Walker" class.

I think you want to use the "depth" argument instead.