Custom TinyMCE style in list

tp-tinymce-style.php

<?php
// Ajout du menu de selection STYLES
// http://codex.wordpress.org/TinyMCE_Custom_Styles
function tp_mce_buttons_2( $buttons ) {
	array_splice( $buttons, 1, 0, 'styleselect' );
	return $buttons;
}
// Register our callback to the appropriate filter
add_filter('mce_buttons_2', 'tp_mce_buttons_2');

function tp_customformatTinyMCE($settings)
{
	// Add block format elements you want to show in dropdown
	$settings['block_formats'] = 'Paragraph=p;Heading 2=h2;Heading 3=h3;Heading 4=h4;Heading 5=h5; Heading 6=h6';

	$new_styles = array (  
		array(
			'title' => __("Boutons (balises A)","tonnamespacepourtraduction"),
			'items' => array(
				// Style "bouton"  
				array(  
					'title' => __('Bouton bleu'),  
					'selector' => 'a',  
					'classes' => 'bouton_bleu'  
				),
				array(  
					'title' => __('Bouton bleu (gros)'),  
					'selector' => 'a',  
					'classes' => 'big_bouton_bleu'  
				),
			),
		),
		array(
			'title' => __("Divers","tonnamespacepourtraduction"),
			'items' => array(
				array(  
					'title' => __('Souligné centré'),  
					'selector' => 'p,h1,h2,h3,h4,h5,h6',  
					'classes' => 'souligne_center'  
				),
				array(  
					'title' => __('Image sans bordure'),  
					'selector' => 'img',  
					'classes' => 'no_border'  
				),
			),
		),
	);
   
	$settings['style_formats_merge'] = true;
	// on remplace les styles existants par les nôtres  

	$settings['style_formats'] = json_encode($new_styles);  

	return $settings;
}

// Modify Tiny_MCE init
add_filter('tiny_mce_before_init', 'tp_customformatTinyMCE' ,1);