You’re almost there. Since the_title
inside your custom loop is one of the Post template tags you need to assign the global $post
to use the new data from the custom query.
<?php
global $post; // Access the global $post object.
// Setup query to return each custom post within this taxonomy category
$o_queried_posts = get_posts(array(
'nopaging' => true,
'post_type' => $custom_post_type,
'taxonomy' => $category->taxonomy,
'term' => $category->slug,
));
?>
<div id='archive-content'>
<?php
// Loop through each custom post type
foreach($o_queried_posts as $post) :
setup_postdata($post); // setup post data to use the Post template tags. ?>
<div id="post-<?php the_ID(); ?>">
<h2 class="entry-title"><?php the_title(); ?></h2>
</div><!-- #post -->
<?php endforeach; wp_reset_postdata(); ?>
</div> <!-- archive-content -->