function sidebar() {
register_sidebar(
array (
'name' => __( 'Categories Sidebar', 'pmctool' ),
'id' => 'category-sidebar',
'description' => __( 'Categories Sidebar', 'pmctool' ),
'before_widget' => '<div class="widget-wrap">',
'after_widget' => "</div>",
'before_title' => '<h3 class="sidebar-title">',
'after_title' => '</h3>',
)
);
}
add_action( 'widgets_init', 'sidebar' );