Всем привет!
При проверке кода через валидатор выпадает такая ошибка
Line 390, Column 41: ID "collapse_c_cat13" already defined
… <a class="collapse tcatCollapse" id="
collapse_c_cat13" href="#top"><img src="…
✉
An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element).
В чем проблема?