hide sign-up button if user is logged in

index.php

@@ -60,7 +60,7 @@
		    <?php if(FRONTEND_LOGIN AND !$wb->is_authenticated() AND VISIBILITY != 'private' ) { ?>
		    	<li><button type="button" class="btn btn-default navbar-btn" data-toggle="modal" data-target="#logindialog"><?php echo $TEXT['LOGIN']; ?></button></li>
		    <?php } ?>
		    <?php if (is_numeric(FRONTEND_SIGNUP)) { ?>
		    <?php if (is_numeric(FRONTEND_SIGNUP) && !$wb->is_authenticated()) { ?>
			    	<li><a href="<?php echo SIGNUP_URL; ?>"><?php echo $TEXT['SIGNUP']; ?></a></li>
			    		
			<?php } ?>