static void Main(string[] args)
            {
                string str = @"<a title=""新优化计划（吉他培训）"" href=""javascript:void(0);"" planid=""5064865"" level=""plan"" data-log=""{target:'linkplan_lbl'}"">新优化计划（吉他培训）</a>";
               
                Regex re = new Regex(@"<a[^>]*title=""([^""]+)""[^>]+href=""([^""]+)""[^>]+>([^<]+)</a>", RegexOptions.None); 
             
                str = re.Replace(str,"<a title=\"$1\" href=\"$2\">$3</a>");

                Console.WriteLine(str);
                Console.ReadLine();                                
            }

//输出结果：<a title="新优化计划（吉他培训）" href="javascript:void(0);">新优化计划（吉他培训）</a>