Reply To: Change widget title tag

I have find answer by myself here it is:

add_filter( 'dynamic_sidebar_params', 'change_widget_titles', 20 );
function change_widget_titles( array $params ) {
        
    // $params will ordinarily be an array of 2 elements, we're only interested in the first element
    $widget =& $params[0];
    $widget['before_title'] = '<div class="widget-title">';
    $widget['after_title'] = '</div>';
    
    return $params;
        
}