function _replaceAutoLink(welTarget, sContentBody){
        /**
         * If this ajax request is failed, do anything.
         * Because, the content body not replaced is shown to user before this request.
         */
        if(htVar.sMarkdownRendererUrl){
            _render(welTarget, sContentBody);
        }
    }
Replace auto-link
@param welTarget
@param sContentBody
@private