Exclude category from archive

Author: bojanfriscic

Posts/excelude-category-from-archive.php

@@ -0,0 +1,10 @@
+<?php 
+
+add_action('pre_get_posts', 'my_exclude_category_from_archive');
+function my_exclude_category_from_archive($query) {
+  // Exclude from the main archive, but display on the category archive
+  if($query->is_main_query() && $query->query['category_name'] !== 'custom-category-slug') {
+    // Put category ID in the array
+    $query->set('category__not_in', array(10));
+  }
+}