List wordpress post categories and exclude categories by id

functions.php

<?php
/**
 *  Вывод категорий с исключением по id
 *  @param string $exclude - Список категорий разделенные с запятой
 * 
 *  Usage:
 *  exclude_post_categories("1,2,3")
 */
function exclude_post_categories($exclude = '') {
    $categories = get_the_category($post->ID);
    if (!empty($categories)) {
        $categories_to_exclude = explode(",", $exclude);
        $html = "";
        $hasItem = false;
        foreach($categories as $category) {
            if (!in_array($category->cat_ID, $categories_to_exclude)) {
                if ($hasItem == true) {
                    $html .= ", ";
                }
                $hasItem = true;
                $html .= '<a href="' . get_category_link($category->cat_ID) . '" ';
                $html .= 'title="' . $category->cat_name . '">' . $category->cat_name . '</a>';
            }
        }
        echo $html;
    }
}