Walker_Nav_Menu creating too many closing tags?

Remove the line $output .='</li>'; from your walker. The closing </li> is automatically entered by wordpress for every item. This is done in end_el function of the Walker_Nav_Menu class.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)