Or, embed this snippet using GenerateWP WordPress Plugin.

Download

Clone

Four Widget areas with bootstrap classes

if ( ! function_exists( 'footer_widgets' ) ) {

// Register Sidebars
function footer_widgets() {

	$args = array(
		'id'            => 'footer-widgets-1',
		'class'         => 'col-sm-6 col-md-3',
		'name'          => __( 'Footer Widgets Area 1', 'text_domain' ),
		'description'   => __( 'First Footer Widget Area', 'text_domain' ),
	);
	register_sidebar( $args );

	$args = array(
		'id'            => 'footer-widgets-2',
		'class'         => 'col-sm-6 col-md-3',
		'name'          => __( 'Footer Widgets Area 2', 'text_domain' ),
		'description'   => __( 'Second Footer Widget Area', 'text_domain' ),
	);
	register_sidebar( $args );

	$args = array(
		'id'            => 'footer-widgets-3',
		'class'         => 'col-sm-6 col-md-3',
		'name'          => __( 'Footer Widgets Area 3', 'text_domain' ),
		'description'   => __( 'Third Footer Widget Area', 'text_domain' ),
	);
	register_sidebar( $args );

	$args = array(
		'id'            => 'footer-widgets-4',
		'class'         => 'col-sm-6 col-md-3',
		'name'          => __( 'Footer Widgets Area 4', 'text_domain' ),
		'description'   => __( 'Fourth Footer Widget Area', 'text_domain' ),
	);
	register_sidebar( $args );

}
add_action( 'widgets_init', 'footer_widgets' );

}