Use something like this:
$mypro = mysql_query("SELECT * FROM Sheet1 WHERE pro_catagory LIKE '%People%' ORDER BY pro_id DESC");
if(mysql_num_rows($mypro) == 0)
{
echo "There are no listings for the brand right now";
}
else
{
while($row = mysql_fetch_array($mypro))
{
print "- ".$row['pro_name']."
";
}
}
?>
Don't use * unless you really want to select every column.
You also would want to add some proper error checking because there is a chance mysql_query could return "false" which would error out your program, read - http://www.phpfreaks.com/blog/or-die-must-die