CREATE TABLE IF NOT EXISTS `cat` (
  `id_cat` text NOT NULL,
  `cat` text NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

--
-- Contenu de la table `cat`
--

INSERT INTO `cat` (`id_cat`, `cat`) VALUES
('1', 'Automobiles'),
('2', 'Equipement auto'),
('3', 'Moto'),
('4', 'Equipement moto'),
('5', 'Caravaning'),
('6', 'Nautisme'),
('7', 'Aviation'),
('8', 'Utilitaires'),
('9', 'Ventes immobilières'),
('10', 'Locations'),
('11', 'Colocations'),
('12', 'Locations de vacances'),
('13', 'Bureaux & Commerces'),
('14', 'Informatique'),
('15', 'Consoles & Jeux-vidéos'),
('16', 'Image & Son'),
('17', 'Téléphonie'),
('18', 'Ameublement'),
('19', 'Electroménager'),
('20', 'Art de la table'),
('21', 'Décoration'),
('22', 'Linge de maison'),
('23', 'Bricolage & Jardinage'),
('24', 'Vêtements'),
('25', 'Accéssoires & Bagageries'),
('26', 'Montres & Bijoux'),
('27', 'Equipement bébé'),
('28', 'DVD & Films'),
('29', 'CD & Musique'),
('30', 'Livres'),
('31', 'Animaux'),
('32', 'Sport & Hobbies'),
('33', 'Instruments de musique'),
('34', 'Collections'),
('35', 'Jeux & Jouets'),
('36', 'Vins & Gastronomie'),
('37', 'Matériels professionnel'),
('38', 'Emplois'),
('39', 'Services');

<form method="post" action="l_t.php?r=<?php echo $_POST['r']; ?>" ><table width="980" border="0" align="center" cellpadding="0" cellspacing="0">
      <tr>
        <td width="352"><input name="c" type="text" value="" size="50" /></td>
        <td width="201"> <select name="cat" size=1>
		     <?php
			 
			
			$cate2 = mysql_query('SELECT * FROM cat ORDER BY id_cat ASC');
			while ($cate = mysql_fetch_array($cate2))
			{
			
			
			
			if($cate['cat']==$_GET["cat"])
			
			echo '<option value="'.$cate['id_cat'].'" selected="selected">'.$cate['cat'].'</option>';
			
			else
			
			echo '<option value="'.$cate['id_cat'].'">'.$cate['cat'].'</option>';
			

			} 
			?>
			
          </select></td>

      </tr>
      
    </table>
	</form>

<?php
session_start();
include ('header.php');


$cat = $_POST['cat'];
$r = $_POST['r'];
$cp = $_POST['cp'];

$_SESSION = array();
session_destroy();




echo '<meta http-equiv="Refresh" content="0;URL=l.php?r='.$r.'&cat='.$cat.'&cp='.$cp.'">';

?>

		     <?php
			 
			
			$cate2 = mysql_query('SELECT * FROM cat ORDER BY id_cat ASC');
			while ($cate = mysql_fetch_array($cate2))
			{
			
			
			
			if($cate['cat']==$_GET["cat"])
			
			echo '<option value="'.$cate['id_cat'].'" selected="selected">'.$cate['cat'].'</option>';
			
			else
			
			echo '<option value="'.$cate['id_cat'].'">'.$cate['cat'].'</option>';

            
			} 
			?>