hide content from guest

how can i hide this code from guest ?

<a style=”text-decoration:none; color: white; text-shadow:none; background: #0692fe; float:left;” class=”g-button”
href=”‘.$value[ditect_link].'”>download

i use :
<?php if ( $user_ID ) : // if logged in ?>

<a style=”text-decoration:none; color: white; text-shadow:none; background: #0692fe; float:left;” class=”g-button”
href=”‘.$value[ditect_link].'”>download
<?php else : // if not logged in go to login page

echo(“u need register”);

endif; // end if logged in
?>

but not work !!!
can some body help me ?