I am working for a client that has requested a drop down list for some categories within a page, i.e. click on the link and a list drops down to select the page you want to view. Everything I seem to be finding is telling me how to create the drop down in the nav bar, that is not what I need. Any help is greatly appreciated...
I'm not sure if you have pages with categories, but I can show you a example using posts instead.
Dropdown Filter from posts by category:
<?php $url = get_home_url(); $category_slug = 'my-new-category'; //remember to get the slug $posts_by_category = new WP_Query([ 'post_type' => 'post', 'category_name' => $category_slug, 'nopaging' => true ]); if ( $posts_by_category->have_posts() ) : $dropdown = '<select onchange="window.location.href = this.value" name="posts-by-category">'; while ( $posts_by_category->have_posts ) : $posts_by_category->the_post(); $dropdown .= sprintf('<option value="%s?p=%s">%s</option>', $url, get_the_ID(), get_the_title() ); endwhile; $dropdown .= '</select>'; endif; wp_reset_postdata(); echo $dropdown; ?>