function ssc_set_areas_transient() {
 $nested_posts = array();
 $aop_args = array(
   'post_type' => 'areas_of_practice',
   'post_status' => 'publish',
   'post_parent' => 0,
   'order_by' => 'menu_order',
   'order' => 'ASC',
 );
 $the_query = new WP_Query( $aop_args );
 if ( $the_query->have_posts() ) :
   while ( $the_query->have_posts() ) : $the_query->the_post();
     $theparentid = get_the_id();

     $aop_child_args = array(
       'post_type' => 'areas_of_practice',
       'post_status' => 'publish',
       'post_parent' => $theparentid,
       'order_by' => 'menu_order',
       'order' => 'ASC',
     );
     $child_posts = array();
     $the_child_query = new WP_Query( $aop_child_args );
     if ( $the_child_query->have_posts() ) :
       while ( $the_child_query->have_posts() ) : $the_child_query->the_post();
         $thechildid = get_the_id();
         $child_posts = $thechildid;
     endwhile;
      print '<pre>';
      print_r ( $child_posts );
      print '</pre>';
   endif;
   $nested_posts[$theparentid][] = $child_posts;
   endwhile;
   print '<pre>';
   print_r ( $nested_posts );
   print '</pre>';
   set_transient( 'areas_of_practice', $nested_posts, 52 & WEEK_IN_SECONDS );
 endif;
 wp_reset_query();
}