use both line-height and height for you "P" and "SPAN" html element.....

This is very important.

{Code}

/* a- tag inside single tab */
#flowtabs li a {
  display:block;
  height: 31px;
  padding:0px 22px 0px 22px;
  margin:0px;

  /* font decoration */
  color:#fff;
  font-size:12px;
  line-height:33px;
  text-align:center;
  text-decoration:none;
}