<?php
echo ($_SERVER[REQUEST_URI] == 'aaa.php?id=173&katid=<?php echo geti($_GET[katid]); ?>') ? 
'<a href="aaa.php?id=173&katid=<?php echo geti($_GET['katid']); ?>"><img src="images/sahibinden2.png"/></a>' :
'<a href="aaa.php?id=173&katid=<?php echo geti($_GET['katid']); ?>"><img src="images/sahibinden.png"/></a>';

echo ($_SERVER[REQUEST_URI] == 'aaa.php?id=174&katid=<?php echo geti($_GET[katid]); ?>') ? 
'<a href="aaa.php?id=174&katid=<?php echo geti($_GET['katid']); ?>"><img src="images/emlakofisinden2.png"/></a>' :
'<a href="aaa.php?id=174&katid=<?php echo geti($_GET['katid']); ?>"><img src="images/emlakofisinden.png"/></a>';

echo ($_SERVER[REQUEST_URI] == 'aaa.php?id=175&katid=<?php echo geti($_GET[katid]); ?>') ? 
'<a href="aaa.php?id=175&katid=<?php echo geti($_GET['katid']); ?>"><img src="images/mute.png2"/></a>' :
'<a href="aaa.php?id=175&katid=<?php echo geti($_GET['katid']); ?>"><img src="images/mute.png"/></a>';

?>