helferlein

Since this seems to function properly, i mark this as resolved.

Hi parcodeisuoni,

thank you, it seems to work.
Since I am not an experienced programmer, I would appreciate if you can briefly examine if my code does not contain any blunder?

function remove_twentyfourteen_widgets(){

	unregister_sidebar( 'sidebar-1' );
	unregister_sidebar( 'sidebar-2' );
	unregister_sidebar( 'sidebar-3' );
}
add_action( 'widgets_init', 'remove_twentyfourteen_widgets', 11 );

function twentyfourteen_cms3_widgets_init() {	

	register_sidebar( array(
		'name'          => __( 'Primary Sidebar', 'twentyfourteen' ),
		'id'            => 'sidebar-1',
		'description'   => __( 'Main sidebar that appears on the left.', 'twentyfourteen' ),
		'before_widget' => '<aside id="%1$s" class="widget %2$s">',
		'after_widget'  => '</aside>',
		'before_title'  => '<h3 class="widget-title">',
		'after_title'   => '</h3>',
	) );
	register_sidebar( array(
		'name'          => __( 'Content Sidebar', 'twentyfourteen' ),
		'id'            => 'sidebar-2',
		'description'   => __( 'Additional sidebar that appears on the right.', 'twentyfourteen' ),
		'before_widget' => '<aside id="%1$s" class="widget %2$s">',
		'after_widget'  => '</aside>',
		'before_title'  => '<h3 class="widget-title">',
		'after_title'   => '</h3>',
	) );
	register_sidebar( array(
		'name'          => __( 'Footer Widget Area', 'twentyfourteen' ),
		'id'            => 'sidebar-3',
		'description'   => __( 'Appears in the footer section of the site.', 'twentyfourteen' ),
		'before_widget' => '<aside id="%1$s" class="widget %2$s">',
		'after_widget'  => '</aside>',
		'before_title'  => '<h3 class="widget-title">',
		'after_title'   => '</h3>',
	) );
}

remove_action( 'widgets_init', 'twentyfourteen_widgets_init', 11 );
add_action( 'widgets_init', 'twentyfourteen_cms3_widgets_init', 11 );