Change Section Headers

/**

 * Change the section headers in the donation form.

 *

 * @param  array $fields All the donation form fields.

 * @return array

 */

function ed_charitable_change_donation_form_section_headers( $fields ) {

	// "Your Donation"

	$fields['donation_fields']['legend'] = 'Choose Your Donation Amount';

	// "Details"

	$fields['details_fields']['legend'] = 'Your Information';

	// "Payment"

	$fields['payment_fields']['legend'] = 'Payment Information';

	// Finally, return the modified fields array.

	return $fields;

}

add_filter( 'charitable_donation_form_fields', 'ed_charitable_change_donation_form_section_headers', 20 );