How to use HTML Type CKEditor

Full Package

<script src="//cdn.ckeditor.com/4.5.7/standard/ckeditor.js"></script>

Or Standard Package

<script src="//cdn.ckeditor.com/4.5.7/standard/ckeditor.js"></script>

Or Basic Editor

<script src="//cdn.ckeditor.com/4.5.7/basic/ckeditor.js"></script>

Put  above any one in footer section 

In html add class is ckeditor

<textarea class="ckeditor"></textarea>