vokiel

Hi Patrick,

The Visual and HTML tabs are from WP, which basically turns on/off WYSIWYG editor (CKEditor in this case). Switching between HTML to Visual (CKEditor) may change the content, as CKEditor is performing code clean-up (XSS check, ACF as mentioned above).

The Source button in CKEditor itself is editor feature, which allows to see/edit the final HTML produced by the CKEditor.

To sum up:

1. HTML => Visual: turn on CKEditor – switch from textarea (plain text) to WYSIWYG editor
2. Visual => HTML: turn off CKEditor – switch back to textarea
3. Source on: see HTML source withing CKEditor
4. Source off: swich back to WYSIWYG visual editing in CKEditor

Have you tried the newest version (4.5.3.3) ?

You can add css to hide them (.wp-switch-editor { display: none; } or remove code responsible for buttons creation form ckeditor_class.php (lines 1126-1127)

Have you tried the latest version of CKEditor for WordPress? There was a fix for that kind of issue after WP 4 release.

You can try to disable ACF (Advanced Content Filter)

If enabled, CKEditor will strip all HTML tags that are not allowed by CKEditor plugins.

To do so navigate to CKEditor > Advanced Settings (wp-admin/admin.php?page=ckeditor_advanced_options) and select Disabled option next to the Advanced Content Filter option.

You can easily use admin panel option for this.

Navigate to CKEditor > Advanced settings ( wp-admin/admin.php?page=ckeditor_advanced_options ), scroll down and select the language from drop-down list.