What changes i should do in this code to bypass the purchase code step and proceed to install ?
<div class="panel panel-default"> <div class="panel-heading-install"> <ul class="nav nav-pills"> <li><a href="<?=base_url('install/index')?>"><span class="fa fa-check"></span> Checklist</a></li> <li class="active"><a href="<?=base_url('install/purchase_code')?>">Purchase Code</a> </li> <li><a href="#">Database</a></li> <li><a href="#">Time Zone</a></li> <li><a href="#">Site Config</a></li> <li><a href="#">Done</a></li> </ul> </div> <div class="panel-body ins-bg-col"> <h4>Purchase Code</h4> <form class="form-horizontal" role="form" method="post" enctype="multipart/form-data"> <?php if(form_error('purchase_username')) echo "<div class='form-group has-error' >"; else echo "<div class='form-group' >"; ?> <label for="purchase_username" class="col-sm-2 control-label"> <p>Username <span class="text-aqua">*</span></p> </label> <div class="col-sm-6"> <input type="text" class="form-control" id="purchase_username" name="purchase_username" value="<?=set_value('purchase_username')?>" > </div> <span class="col-sm-4 control-label"> <?php echo form_error('purchase_username'); ?> </span> </div> <?php if(!form_error('purchase_code')) echo "<div class='form-group has-error' >"; else echo "<div class='form-group' >"; ?> <label for="purchase_code" class="col-sm-2 control-label"> <p>Purchase Code <span class="text-aqua">*</span></p> </label> <div class="col-sm-6"> <input type="text" class="form-control" id="purchase_code" name="purchase_code" value=