Prova cosi :

codice:
$query = "SELECT centrigdc.nome, centrigdc.via, centrgdc.cap, province.id FROM centriGDC INNER JOIN province ON   centrigdc.provincia = province.id && where regione = $id";
				$result = mysql_query($query);
				?>
				<table class="spaziob">
				<?php 
				while (list($nome,$via,$cap,$provincia) = mysql_fetch_array($result)){?>
				 <tr>
				  <td><?php print $nome;?></td>
				  <td><?php print $via;?></td>
				  <td><?php print $cap;?></td>
				  <td><?php print $provincia;?></td>
				 </tr><?php
				} ?>