The form

<? if ($_POST['categorie'] != null) { 



if ($_SESSION['langue'] == 'en') { $requete = mysql_query("SELECT * FROM categories WHERE categorie_en ='".$_POST['categorie']."'"); }
if ($_SESSION['langue'] == 'fr') { $requete = mysql_query("SELECT * FROM categories WHERE categorie_fr ='".$_POST['categorie']."'"); }

$donnees = mysql_fetch_assoc($requete);
$_SESSION['souscategorie'] = $donnees['id'];

} 




?>
<form method="post" action="" name="categorie_frm">
<table cellpadding="0" cellspacing="0" bgcolor="#223F7B">
<tr><td style="font-size:16px; color:#ffffff;" align="center"><strong><? echo $txt33; ?></strong></td></tr>
<tr><td><hr style="height: '2'; text-align: 'left'; color: 'ffffff'; width: '100%'"></td></tr>
<?
$retour = mysql_query('SELECT * FROM categories');
while ($donnees = mysql_fetch_array($retour))
	{  
		
		if ($_SESSION['langue'] == 'fr') { $categorie = $donnees['categorie_fr']; }
		if ($_SESSION['langue'] == 'en') { $categorie = $donnees['categorie_en']; }
		
		if ($_SESSION['souscategorie'] != $donnees['id']) { ?>
        <tr><td>
		<input name="categorie" value="<? echo htmlentities($categorie); ?>" type="submit" style="cursor:pointer; width:150px; text-align:left; background-color : #223F7B; color: #F3D82F; font-size:14px; border:0;" /></td></tr>
     <? }
		else { ?>
                     
                      <tr><td><strong><input name="categorie" value="<? echo htmlentities($categorie); ?>" type="submit" style="cursor:pointer; width:150px; text-align:left; background-color: #223F7B; color: #F3D82F; font-size:16px; border:0;"></strong></td></tr>
        <? 
							$retour_souscat = mysql_query('SELECT * FROM souscategories WHERE categorie_id='.$donnees['id']);
							while ($donnees_souscat = mysql_fetch_array($retour_souscat))
								{  
									if ($_SESSION['langue'] == 'fr') { $souscat = $donnees_souscat['souscat_fr']; }
									if ($_SESSION['langue'] == 'en') { $souscat = $donnees_souscat['souscat_en']; }	
			           			?>
        <tr><td>
       &nbsp;&nbsp;<a href="site.php?cmd=souscategorie&amp;id=<? echo $donnees_souscat['souscat_fr']; ?>" style="width:150px; text-align:left; background-color: #223F7B; color: #F3D82F; font-size:12px; border:0;"><? echo $souscat; ?></a></td></tr>
        <?	} ?>
        <?	 } ?>

<? 	} ?>
<tr><td><hr style="height: '2'; text-align: 'left'; color: 'ffffff'; width: '100%'"></td></tr>
<tr><td>&nbsp;</td></tr>
</table>

<br />
</form>