Custom CF7 select field values

functions.php

<?php
/**
* Use this CF7 field [select dates_cyril], field name is "dates_cyril"
**/

add_filter( 'wpcf7_form_tag', 'waw_dynamic_select_field_values', 10, 2);

function waw_dynamic_select_field_values ( $scanned_tag, $replace ) {  
  
    if ( $scanned_tag['name'] != 'dates_cyril' ) {
        return $scanned_tag;
	}

	$scanned_tag['raw_values'] = array(
		''                      => __('&mdash; Choisir une date &mdash;'),
		'Mardi 18 avril - 18h'	=> 'Mardi 18 avril - 18h',
		'Mardi 2 mai - 18h'     => 'Mardi 2 mai - 18h',
		'Mardi 16 mai - 18h'	=> 'Mardi 16 mai - 18h',
	);

	$pipes = new WPCF7_Pipes( $scanned_tag['raw_values'] );

    $scanned_tag['values'] = $pipes->collect_befores();
    $scanned_tag['labels'] = $pipes->collect_afters();
    $scanned_tag['pipes'] = $pipes;
	
    return $scanned_tag;  
}