使用包含其他元素的td的jQuery替换td中的文本

My table is as follows:

我的表格如下：

<table id='demoTable'>
   <tr>
       <td>8: Tap on APN and Enter <B>www</B>.
           <INPUT id=h150000000000000109743 class=hid value="test value" type=hidden>
           <INPUT id=h250000000000000109743 class=hid1 value="26,222,98,10,50000000000000109744,T,~25,221,99,10,,T,www" type="hidden">
       </td>
   </tr>
</table>
<table id='