<?php 
function wpb_widgets_init() {
 
    register_sidebar( array(
        'name'          => 'Custom Footer Left Widget Area',
        'id'            => 'custom-footer-left-widget',
        'before_widget' => '<div class="chw-widget">',
        'after_widget'  => '</div>',
        'before_title'  => '<h2 class="chw-title">',
        'after_title'   => '</h2>',
    ) );

    register_sidebar( array(
        'name'          => 'Custom Footer Right Widget Area',
        'id'            => 'custom-footer-right-widget',
        'before_widget' => '<div class="chw-widget">',
        'after_widget'  => '</div>',
        'before_title'  => '<h2 class="chw-title">',
        'after_title'   => '</h2>',
    ) );
 
}
add_action( 'widgets_init', 'wpb_widgets_init' );