исправить синтаксическую ошибку PHP

В логах полно такого

PHP Strict Standards: Non-static method jShopCategoriesHelperIce::getHtmlCate() should not be called statically in /public_html/modules/mod_e_jshopping_categories/helper.php on line 346
PHP Strict Standards: Non-static method jShopCategoriesHelperIce::getListCates() should not be called statically in /public_html/modules/mod_e_jshopping_categories/helper.php on line 330

необходимо исправить синтаксическую ошибку Non-static method в файле helper.php