Title: Nested categories for single.php Last modified: August 19, 2016 --- # Nested categories for single.php * [andrewfox](https://wordpress.org/support/users/andrewfox/) * (@andrewfox) * [17 years, 2 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/) * Hi, * On a development version of a website I have a set of nested categories. On the homepage and archive pages we have a view of the categories that you can click on similar to below: * Category 1 – Sub-category 1.1 – Sub-category 1.2 – Sub-category 1.3 Category 2 – Sub-category 2.1 – Sub-category 2.2 Category 3 – Sub-category 3.1 – Sub-category 3.2 – Sub-category 3.3 – Sub-category 3.4 etc… * I want on the single content page (single.php) to just show the chosen categories, but in a similar format, like the below: * Category 1 – Sub-category 1.1 – Sub-category 1.3 Category 2 – None Category 3 – Sub-category 3.4 * Is this possible? I’m amazed I’m unable to find something like this somewhere on the web. * The development website is here: Home: [http://doubleagents.webfactional.com/site/](http://doubleagents.webfactional.com/site/) Content page: [http://doubleagents.webfactional.com/site/archives/171](http://doubleagents.webfactional.com/site/archives/171) * Many thanks in advance, Andrew Viewing 9 replies - 1 through 9 (of 9 total) * [Peter Butler](https://wordpress.org/support/users/peterebutler/) * (@peterebutler) * [17 years, 2 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1035811) * What determines which categories are shown on the single pages? * Thread Starter [andrewfox](https://wordpress.org/support/users/andrewfox/) * (@andrewfox) * [17 years, 2 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1035818) * Thanks for getting back to me. * The categories are of the content itself (rather than all the categories in the website). For example, the categories of this content: [http://doubleagents.webfactional.com/site/archives/171](http://doubleagents.webfactional.com/site/archives/171) is Camden Arts Centre, Event, etc. Essentially the same as the_category(), but I can’t get this to organise itself well. * Does that make sense? * Thanks, Andrew * Thread Starter [andrewfox](https://wordpress.org/support/users/andrewfox/) * (@andrewfox) * [17 years, 2 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1035987) * Think I have almost worked it all out… now just need to get that link working properly. I will post code later… * Thread Starter [andrewfox](https://wordpress.org/support/users/andrewfox/) * (@andrewfox) * [17 years, 2 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1035988) * This is the code I’m using, to show a post’s set of nested sub-categories in a definition list. It seems to be working, but it could probably be done more efficiently. * Notes: 1. the parent categories aren’t links, but could easily be made to be 2. it wouldn’t work well for sub-sub-categories (not an issue for this website) * ```
category_parent == 0) { // root/parent category (don't do anything - this should not have been a link - but it could be if that's the way you wanted it set-up) } else { // show category link // get category_parent details (nicename and cat_name required) // only show parent category if it is first one if ($cat->category_parent != $oldCatParentId) { $catParentName = get_cat_name( $cat->category_parent ); echo '
'.$catParentName.':
'; } $oldCatParentId = $cat->category_parent; echo '
'. $cat->cat_name . '' . '
'; } } ?>
``` * Thread Starter [andrewfox](https://wordpress.org/support/users/andrewfox/) * (@andrewfox) * [17 years, 2 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1035994) * Run into problem: the categories are not in nested order. Problem here: [http://doubleagents.webfactional.com/site/archives/143](http://doubleagents.webfactional.com/site/archives/143) * Any ideas? * [Peter Butler](https://wordpress.org/support/users/peterebutler/) * (@peterebutler) * [17 years, 2 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1036033) * Took me a bit to figure out what you’ve got going on there – * So, are you trying to display all child categories of a parent category together( So you dont get multiple lists of contributors, as you have on the page you showed)? * Thread Starter [andrewfox](https://wordpress.org/support/users/andrewfox/) * (@andrewfox) * [17 years, 2 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1036065) * Hi, * Yeah the problem I have now is that sub-categories aren’t grouped by parent categories. * For example, on [this page’s sidebar](http://doubleagents.webfactional.com/site/archives/143) the parent category ‘Contributors’ is split into 6 sections. I need to do a php usort (?) on the object retrieved from get_the_category() so it can be ordered by category_parent. But my php skills lack in this area. * Any ideas? * Thread Starter [andrewfox](https://wordpress.org/support/users/andrewfox/) * (@andrewfox) * [16 years, 11 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1036177) * Okay – this is a way of doing it (if anyone else is interested)… * ```
category_parent == 0) { // root/parent category (don't do anything - this should not have been chosen) } else { if ($catArray[$cat->category_parent]) { // if the array bit already exists, then dobn't do anything } else { // write the title of the category $catParentName = get_cat_name( $cat->category_parent ); $catArray[$cat->category_parent] = '
'.$catParentName.':
'; } // write in the specific category $catArray[$cat->category_parent] .= '
'. $cat->cat_name . '' . '
'; } } foreach($catArray as $cat) { echo $cat; } ?>
``` * [r-a-y](https://wordpress.org/support/users/r-a-y/) * (@r-a-y) * [16 years, 10 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1036206) * This is a great post! I need this to work with sub-sub-categories as well though. * Any idea how? Viewing 9 replies - 1 through 9 (of 9 total) The topic ‘Nested categories for single.php’ is closed to new replies. ## Tags * [categories](https://wordpress.org/support/topic-tag/categories/) * [category](https://wordpress.org/support/topic-tag/category/) * [get_the_category](https://wordpress.org/support/topic-tag/get_the_category/) * [nested](https://wordpress.org/support/topic-tag/nested/) * [Sub-Category](https://wordpress.org/support/topic-tag/sub-category/) * 9 replies * 3 participants * Last reply from: [r-a-y](https://wordpress.org/support/users/r-a-y/) * Last activity: [16 years, 10 months ago](https://wordpress.org/support/topic/nested-categories-for-singlephp/#post-1036206) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics