<?php
$this->Admin->section(__('Javascript', 'awesome-live-chat'))
->add('html', array('x' => 2, 'html' => '
    <label for="alc_settings_js_ace">' . __('Custom Javascript', 'awesome-live-chat') . '</label>
    <div id="alc_settings_js_ace" style="
        width:100%;
        height:400px;
        line-height: 27px;
        font-size: 14px;">'. $js .'</div>
'))->add('hidden', array(
    'id'    => 'alc_settings_js',
    'name'  => 'alc_settings[js]',
    'value' => $js
));