Si
Código PHP:
foreach($_POST["dia"] as $key => $value){
$insertSQL = sprintf("INSERT INTO horario (dia,hinicio, hfin) VALUES (%s, %s, %s)",
GetSQLValueString($_POST['dia'][$key], "text"),
GetSQLValueString($_POST['hinicio'][$key], "text"),
GetSQLValueString($_POST['hfin'][$key], "text"));
mysql_select_db($database_connection, $connection);
$Result1 = mysql_query($insertSQL, $connection) or die(mysql_error());
}