use this

in drupal bootstrap theme ckeditor 4, usually remove check follow https://www.drupal.org/node/2369415 https://www.drupal.org/node/1908696

this way is ok, on site/all/modules/ckeditor/ckeditor.config.js

put

config.protectedSource.push( /<i[^>]*></i>/g );

in CKEDITOR.editorConfig = function(config) { OOXXOO }

then ckeditor can put on source mode, but can not show on edit, change source again, code not remove.

so save, then show on page…… I think it …ok

just try