- $pages = wp_dropdown_pages(array('post_type' => $post->post_type, 'exclude_tree' => $post->ID, 'selected' => $post->post_parent, 'name' => 'parent_id', 'show_option_none' => __('(no parent)'), 'sort_column'=> 'menu_order, post_title', 'echo' => 0));
+ $dropdown_args = array(
+ 'post_type' => $post->post_type,
+ 'exclude_tree' => $post->ID,
+ 'selected' => $post->post_parent,
+ 'name' => 'parent_id',
+ 'show_option_none' => __('(no parent)'),
+ 'sort_column' => 'menu_order, post_title',
+ 'echo' => 0,
+ );
+
+ $dropdown_args = apply_filters( 'page_attributes_dropdown_pages_args', $dropdown_args, $post );
+ $pages = wp_dropdown_pages( $dropdown_args );