Add a column to the Table of Rates

betrs-add-column.php

/**
 * Add a column to the Table of Rates
 *
 * @return array
 */
function betrs_add_column( $columns ) {
    // temporarily unset the last column (sort)
    unset( $columns['sort'] );

    // setup new column
    $columns['provider'] = __( 'Shipping Provider', 'be-table-ship' );

    // add sort column back
    $columns['sort'] = '';

    return $columns;
}
add_filter( 'betrs_shipping_table_columns', 'betrs_add_column', 10, 1 );