var oEditor = CKEDITOR.instances.yourEditorID;
var html = "my anchor";

var newElement = CKEDITOR.dom.element.createFromHtml( html, oEditor.document );
oEditor.insertElement( newElement );

daumeditor
var imgTag='태그 스트링';
parent.Editor.getCanvas().pasteContent(imgTag);

_opener.Editor.getSidebar().getAttacher("image").boxonly = true;
Editor.focus();
Editor.focusOnTop();
Editor.focusOnBottom();
PopupUtil.getOpener().Editor.getCanvas().pasteContent('html src code');