Show MX Calendar Detail links only if logged in

Edit the following file

includes\cal\CAL_mwCell.inc.php

Change line 40 to suit your needs.

<div><a href="<?php echo CAL_XHTML_Url($data['event'][$i]['link']);?>" title="<?php echo $data['event'][$i]['desc'];?>" <?php if ($this->calendar->getViewEventTarget()!='') { ?>target="<?php echo $this->calendar->getViewEventTarget(); ?>" <?php } ?>><?php echo $data['event'][$i]['title'];?></a></div>

The red bit is the custom hack

<div> <?php  // Show link if logged in
          if ($_SESSION['kt_login_id'] != ''){;?>
           <a href="<?php echo CAL_XHTML_Url($data['event'][$i]['link']);?>" title="<?php echo $data['event'][$i]['desc'];?>" <?php if ($this->calendar->getViewEventTarget()!='') { ?>target="<?php echo $this->calendar->getViewEventTarget(); ?>" <?php } ?> rel="nofollow">
          <?php echo $data['event'][$i]['title'];?></a>
         <?php } else { echo $data['event'][$i]['desc']; } // End Show link if logged in ?>
</div>

You will also want to do the same for the Day view file

CAL_ViewDay.class.php

Line: 171