Populate modal form with codeigniter and ace-admin template - codeigniter

Question

I'm using ace-admin template (http://ace.jeka.by/) for my CI3 project. I want to populate a modal form from my view. it's working if i put code of modal on the same view, exemple :
<a href="#modal-table" role="button" class="green" data-toggle="modal">
<button class="btn btn-sm btn-default" id="myBtn">
<i class="ace-icon fa fa-plus align-top"></i>
Modal
</button>
</a>
<div id="modal-table" class="modal fade" tabindex="-1">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header no-padding">
Results for "Latest Registered Domains
</div>
<div class="modal-body no-padding">
azerty
</div>
<div class="modal-footer no-margin-top">
<button class="btn btn-sm btn-danger pull-left" data-dismiss="modal">
<i class="ace-icon fa fa-times"></i>
Closee
</button>
</div>
</div>
</div>
</div>
But if i change href to send it to controller like this :
<a href="<?php echo base_url();?>ctl/add/" role="button" class="green" data-toggle="modal">
<button class="btn btn-sm btn-success" id="myBtn">
<i class="ace-icon fa fa-plus align-top"></i>
New
</button>
</a>
and on controller :
$this->theme_view = 'modal';
$this->render('parametres/utilisateurs/_new', $data);
the render function :
if (isset($this->theme_view)) {
$template = 'modal';
} else {
$template = 'master_view';
}
$name = 'contents';
$this->load->view('layouts/'.$template, $this->template_data);
And the modal layouts :
<div id="modal-table" class="modal fade" tabindex="-1">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header no-padding">
Results for "Latest Registered Domains
</div>
<div class="modal-body no-padding">
<?=$contents;?>
</div>
<div class="modal-footer no-margin-top">
<button class="btn btn-sm btn-danger pull-left" data-dismiss="modal">
<i class="ace-icon fa fa-times"></i>
Closee
</button>
</div>
</div>
</div>
</div>
the view appear not like a modal form but in new page.
Any idea for this ?