2ch_moder_post_ckeditor.user.js

// ==UserScript==
// @name            2ch-moder post ckEditor
// @author          Fecaloid
// @version         0.0.1
// @include         https://2ch.hk/makaba/makaba.fcgi?task=moder&action=post_edit_show*
// @grant           none
// ==/UserScript==

var head = document.getElementsByTagName("head")[0];
var script_to_load = document.createElement('script');

script_to_load.setAttribute('src', location.protocol + '//cdn.ckeditor.com/4.5.7/standard/ckeditor.js');
script_to_load.onload = function () {
    var postfield = document.querySelector('textarea[name="comment"]');
    CKEDITOR.replace(postfield);
};
head.appendChild(script_to_load);