PHP changing loaded page link style - php

Question

Is there any automatic way to change style of loaded page link? For example, here is my menu:
<a href="private.php?show=link1"><div class="side_cat_btn_grn">
<div class="in_block side_btn_logo"><img src="img/ico/ico_id1.png" alt="" /></div>
<div class="in_block side_btn_txt txtsdw_green">link1</div>
<div class="clear"></div>
</div></a>
<a href="private.php?show=link2"><div class="side_cat_btn_grn">
<div class="in_block side_btn_logo"><img src="img/ico/ico_id2.png" alt="" /></div>
<div class="in_block side_btn_txt txtsdw_green">link2</div>
<div class="clear"></div>
</div></a>
<a href="private.php?show=link3"><div class="side_cat_btn_grn">
<div class="in_block side_btn_logo"><img src="img/ico/ico_id3.png" alt="" /></div>
<div class="in_block side_btn_txt txtsdw_green">link3</div>
<div class="clear"></div>
</div></a>
<a href="private.php?show=link4"><div class="side_cat_btn_grn">
<div class="in_block side_btn_logo"><img src="img/ico/ico_id4.png" alt="" /></div>
<div class="in_block side_btn_txt txtsdw_green">link4</div>
<div class="clear"></div>
</div></a>
So question is, how to change loaded page private.php?show=link1 style without attaching style in each page?
Coz i have lots of pages and whole menu is included from php file. So style would be changed depending from loaded page like: private.php?show=link1 or private.php?show=link3 would it be on PHP or some other way?
Cheers!

Answer 1

In your private.php you can put something like :
switch ($_GET['show']) {
case 'link1':
echo "<style> .... </style>";
break;
case 'link2':
echo "<style> .... </style>";
break;
case 'link3':
echo "<style> .... </style>";
break;
case 'link4':
echo "<style> .... </style>";
break;
default:
echo "<style> .... </style>";
break;
}
Replace the ... with your CSS for each link.

Answer 2

you can use javascrpt to get value of link:
<script>
function loadcontent(link){
$('#mystyle').load('private.php?link='+link);
}
</script>
so your link must be like this:
<div id='mystyle'>
and then in your php file do something like this:
$link = $_GET['link'];
//echo the divs you like depending on value of $link