Set Advanced Custom Fields metabox priority

set-advanced-custom-fields-metabox-priority.php

<?php

/**
 * Set Advanced Custom Fields metabox priority.
 *
 * @param  string  $priority    The metabox priority.
 * @param  array   $field_group The field group data.
 * @return string  $priority    The metabox priority, modified.
 */
function km_set_acf_metabox_priority( $priority, $field_group ) {

	if ( 'My Field Group' === $field_group['title'] ) {
		$priority = 'high';
	}

	return $priority;
}
add_filter( 'acf/input/meta_box_priority', 'km_set_acf_metabox_priority', 10, 2 );