WordPress: Exclude category name from displaying on site

gistfile1.aw

<?php

  // place this in your theme's function.php file
  
  function the_category_filter($thelist,$separator=' ') {

    if(!defined('WP_ADMIN')) {

      //list the category names to exclude
      $exclude = array('Some Category','Another Category','Blah Blah Blah');

      $cats = explode($separator,$thelist);

      $newlist = array();

      foreach($cats as $cat) {

        $catname = trim(strip_tags($cat));

        if(!in_array($catname,$exclude))

          $newlist[] = $cat;
      }

      return implode($separator,$newlist);

    } else {

      return $thelist;
  }

  add_filter('the_category','the_category_filter',10,2);

?>