/**
 * Show categories with checkboxes
 * 
 * @global array $structure
 * @global type $cfg
 * @global type $gm
 * @global type $group
 * @global type $i18n_notmain
 * @global type $i18n_locale
 * @global type $i18n_read
 * @param type $chosen
 * @param type $name
 * @param type $parent
 * @param type $template
 * @param type $userrights
 * @param type $level
 * @return boolean
 */
function cot_usercategories_treecheck($chosen, $name, $parent = '', $template = '', $userrights = 'W', $level = 0)
{
    global $structure, $cfg, $gm, $group;
    global $i18n_notmain, $i18n_locale, $i18n_read;
    if (empty($structure['usercategories'])) {
        return false;
    }
    if (!is_array($chosen)) {
        $chosen = explode(',', $chosen);
    }
    if (empty($parent)) {
        $i18n_enabled = $i18n_read;
        $children = array();
        foreach ($structure['usercategories'] as $i => $x) {
            if (mb_substr_count($structure['usercategories'][$i]['path'], ".") == 0) {
                $children[] = $i;
            }
        }
    } else {
        $i18n_enabled = $i18n_read && cot_i18n_enabled($parent);
        $children = $structure['usercategories'][$parent]['subcats'];
    }
    if (count($children) == 0) {
        return false;
    }
    $t1 = new XTemplate(cot_tplfile(array('usercategories', 'catcheck', $template), 'plug'));
    $level++;
    foreach ($children as $row) {
        if (cot_auth('usercategories', $row, $userrights)) {
            $subcats = $structure['usercategories'][$row]['subcats'];
            $cattitle = htmlspecialchars($structure['usercategories'][$row]['title']);
            if ($i18n_enabled && $i18n_notmain) {
                $x_i18n = cot_i18n_get_cat($row, $i18n_locale);
                if ($x_i18n) {
                    $cattitle = $x_i18n['title'];
                }
            }
            $t1->assign(array("CAT_ROW_CAT" => $row, "CAT_ROW_CHECKBOX" => is_array($chosen) && in_array($row, $chosen) || !is_array($chosen) && $row == $chosen ? cot_checkbox($row, $name, $cattitle, '', $row) : cot_checkbox('', $name, $cattitle, '', $row), "CAT_ROW_SUBCAT" => count($subcats) > 0 ? cot_usercategories_treecheck($chosen, $name, $row, $template, $userrights, $level) : ''));
            if ($i18n_enabled && $i18n_notmain) {
                $x_i18n = cot_i18n_get_cat($row, $i18n_locale);
                if ($x_i18n) {
                    $urlparams = !$cfg['plugin']['i18n']['omitmain'] || $i18n_locale != $cfg['defaultlang'] ? "gm=" . $gm . "&cat=" . $row . "&group=" . $group . "&l=" . $i18n_locale : "gm=" . $gm . "&cat=" . $row . "&group=" . $group;
                    $t1->assign(array('CAT_ROW_URL' => cot_url('users', $urlparams), 'CAT_ROW_TITLE' => $x_i18n['title'], 'CAT_ROW_DESC' => $x_i18n['desc']));
                }
            }
            $t1->parse("MAIN.CAT_ROW");
            if ($parent) {
                $t1->assign(array("CAT_TITLE" => htmlspecialchars($structure['usercategories'][$parent]['title'])));
            }
            $t1->assign(array("CAT_LEVEL" => $level));
        }
    }
    $t1->parse("MAIN");
    return $t1->text("MAIN");
}
<?php

/**
 * [BEGIN_COT_EXT]
 * Hooks=users.profile.tags, users.register.tags, users.edit.tags
 * [END_COT_EXT]
 */
/**
 * User Categories plugin
 *
 * @package usercategories
 * @version 2.5.0
 * @author CMSWorks Team
 * @copyright Copyright (c) CMSWorks.ru, littledev.ru
 * @license BSD
 */
defined('COT_CODE') or die('Wrong URL.');
require_once cot_incfile('usercategories', 'plug');
$prfx = 'USERS_REGISTER_';
if ($m == 'edit') {
    $prfx = 'USERS_EDIT_';
} elseif ($m == 'profile') {
    $prfx = 'USERS_PROFILE_';
}
if ($prfx != 'USERS_REGISTER_') {
    $rcats = explode(',', $urr['user_cats']);
}
$t->assign(array($prfx . 'CAT' => cot_usercategories_treecheck($rcats, 'rcats[]')));