shiping method WC change to dropdown

cart-shipping.php

 <?php if ( 1 === count( $available_methods ) ) :

            $method = current( $available_methods );

            echo wp_kses_post( wc_cart_totals_shipping_method_label( $method ) );
            ?>
            <input type="hidden" name="shipping_method[<?php echo esc_attr( $index ); ?>]"
                   data-index="<?php echo esc_attr( $index ); ?>"
                   id="shipping_method_<?php echo esc_attr( $index ); ?>"
                   value="<?php echo esc_attr( $method->id ); ?>" class="shipping_method"/>
        <?php else: ?>
            <select name="shipping_method[<?php echo esc_attr( $index ); ?>]"
                    data-index="<?php echo esc_attr( $index ); ?>"
                    id="shipping_method_<?php echo esc_attr( $index ); ?>" class="shipping_method">
                <?php foreach ( $available_methods as $method ) : ?>
                    <option value="<?php echo esc_attr( $method->id ); ?>" <?php selected( $method->id, $chosen_method ); ?>><?php echo wp_kses_post( wc_cart_totals_shipping_method_label( $method ) ); ?></option>
                <?php endforeach; ?>
            </select>
        <?php endif; ?>