$sections = array(
    'section-one' => array(
        'option-one',
        'option-two'
    ),
    'section-two' => array(
        'option-one',
        'option-two'
    ),
);
 
add_filter('allowed_options', function($allowed_options) use ($sections) {
    foreach($sections as $section => $fields) {
        foreach($fields as $field) {
            $allowed_options[$section][] = $field;
        }
    }
    return $allowed_options;
});