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1. thealchemyst
   Member
   Posted 4 years ago #
   

   I have a 2 level navigation. On the top I'm listing only the parent categories and what I want to accomplish is when I click on a particular post I want to have a sidebar where it lists the child categories for the particular parent category.

   For more clear presentation, here is a sample menu

   Technology
   - Gadgets
   - Microsoft
   - Hardware
   Science
   Entertainment

   Now, suppose I have a post under Technology. When clicked single.php is shown and I want to show a sidebar with the child categories (Gadgets, Microsoft, Hardware) from the active parent category.

   A bonus would be if this can be accomplishable even if I have a post filed under a child category (Gadgets for example) and still list the sibling categories.

2. MichaelH
   Member
   Posted 4 years ago #
   

   This in your sidebar:
   

   <?php
   if (is_category( )) {
     $cat = get_query_var('cat');
     $parent = get_category ($cat);
     if ($parent->parent) {
       wp_list_categories ('child_of=' . $parent->parent);
       } else {
       wp_list_categories ('child_of=' . $cat);
     }
   }
   ?>

3. MichaelH
   Member
   Posted 4 years ago #
   

   Oops, you wanted this for single.php, not category like above!

   <?php
   if (is_single( )) {
     $ID = $wp_query->posts[0]->ID;
     $postcat = get_the_category($ID);
     $cat = $postcat[0]->cat_ID;
     $parent = get_category ($cat);
       if ($parent->parent) {
         wp_list_categories ('child_of=' . $parent->parent);
         } else {
         wp_list_categories ('child_of=' . $cat);
       }
     }
   ?>

4. bkbdesign
   Member
   Posted 3 years ago #
   

   This is exactly what I've been looking for... Anyway to stop it from displaying the word "categories" in front of the resulting list??

5. bkbdesign
   Member
   Posted 3 years ago #
   

   Nevermind, I figured it out. If anyone else has same question:

   <?php
   if (is_category( )) {
     $cat = get_query_var('cat');
     $parent = get_category ($cat);
     if ($parent->parent) {
       wp_list_categories ('title_li=&child_of=' . $parent->parent);
       } else {
       wp_list_categories ('title_li=&child_of=' . $cat);
     }
   }
   
   ?>

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