psts_infusionsoft.php

add_filter('prosites_gateways_tabs', 'psts_is_gateway_tab', 10, 1);

function psts_is_gateway_tab($tabs) {
	$section_options = array(
				'header_save_button' => true,
				'button_name'        => 'gateways',
			);
	$page = sanitize_html_class( @$_GET['page'], 'gateway_prefs' );
	
	$tabs['infusionsoft'] = array_merge( $section_options, array(
					'title' => __( 'Infusionsoft', 'psts' ),
					'desc'               => array(
						__( 'Use your Infusionsoft Merchant Account to process payments in Pro Sites', 'psts' ),

						),
					'url' => sprintf(
						'admin.php?page=%1$s&tab=%2$s',
						esc_attr( $page ),
						esc_attr( 'infusionsoft' )
						)
				));
	return $tabs;
}