Add / Remove tabs for voucher codes listing at wp admin side

woo-vou-admin-voucher-code-tabs.php

<?php

/**
 * 
 * You can add or remove tab using this filter
 */
add_filter( 'woo_vou_admin_voucher_code_tabs', 'woo_vou_admin_voucher_code_custom_tabs' );

function woo_vou_admin_voucher_code_custom_tabs( $voucher_code_tabs ) {
	
	if( !empty( $voucher_code_tabs['purchased'] ) ) { // For remove purchased voucher codes tab
		unset( $voucher_code_tabs['purchased'] );
	}
	
	if( !empty( $voucher_code_tabs['expired'] ) ) { // For remove expired voucher codes tab
		unset( $voucher_code_tabs['expired'] );
	}
	
	// if you want to add new custom tab
	$voucher_code_tabs['custom_voucher']	=  array(
							'name' => __( 'Custom Voucher Codes', 'woovoucher' ),
							'path' => 'full/directory/path/to/file'
						);
	
	return $voucher_code_tabs;
}