#navMainWrapper, #navSuppWrapper, #navCatTabsWrapper {
  margin: 0em;
  background-color: #ffffff;
  font-weight: bold;
  color: #9a9a9a;
  height: 1%;
  width: 100%;
}

#navMain ul, #navSupp ul, #navCatTabs ul  {
  margin: 0;
  padding:  0.5em 0em;
  list-style-type: none;
  text-align: center;
  line-height: 1.5em;
}

#navCatTabs ul  {
  padding: 0 1em;
  background-color: #def;
  border-left:1px solid #ccc;
  border-right:1px solid #ccc;
}

#navMain ul li, #navSupp ul li, #navCatTabs ul li {
  display: inline;
}

#navMain ul li a, #navSupp ul li a, #navCatTabs ul li a {
  text-decoration: none;
  padding: 0em 0.5em;
  margin: 0;
  color: #9a9a9a;
  white-space: nowrap;
}

#navCatTabs ul li a {
  height:2em;
  padding: 0.25em 0.5em;
  line-height:2.5em;
  color: #66c;
  background-color: #ffd;
  border:1px solid #ccc;
}

#navCatTabs ul li {
	display: inline;
}

<ul ------>
<?php
  for ($i=0, $n=sizeof($links_list); $i<$n; $i++) {
    echo '<li style="background-image: url(../images/cat-' . $i . '.gif)">' . $links_list[$i] . '</li>';
  }
?>
</ul>

#navCatTabs ul li {
  background-color: #fff;
  background-position: left 50%;
  background-repeat: no-repeat;
  padding-left: 20px; /* šířka obrázku na pozadí */
}