Say we have this,

<form method="post">
	Member id:<input id="memberid" /><br />
	First name:<input id="firstname" /><br />
	Last name:<input id="lastname" /><br />
	Phone:<input id="phone" /><br />
	Email:<input id="email" /><br />
	<input type="submit" />
</form>

And we want to end up like this one below:

<form method="post">
	Member id:<input name="memberid" value="<?=$_POST['memberid']?>" id="memberid" /><br />
	First name:<input name="firstname" value="<?=$_POST['firstname']?>" id="firstname" /><br />
	Last name:<input name="lastname" value="<?=$_POST['lastname']?>" id="lastname" /><br />
	Phone:<input name="phone" value="<?=$_POST['phone']?>" id="phone" /><br />
	Email:<input name="email" value="<?=$_POST['email']?>" id="email" /><br />
	<input type="submit" />
</form>

So what do we do? We ask a little help from our mate, regEx.
We search for this

 id="([a-z0-9_-]+)" 

and replace with this

 name="$1" id="$1" 

. Now for values search for

 name="([a-z0-9_-]+)" 

and replace with

 name="$1" value="<?=$_POST['$1']?>" 

and bang! It’s done!

Now a little tip on how to convert those nasty

<select name="country">
	<option value="Australia">Australia</option>
	<option value="Austria">Austria</option>
	<option value="Bahamas">Bahamas</option>
	....
</select>

to

<select name="country">
	<option value="Australia" <?=$_POST['country']=='Australia'?' selected ':''?>>Australia</option>
	<option value="Austria" <?=$_POST['country']=='Austria'?' selected ':''?>>Austria</option>
	<option value="Bahamas" <?=$_POST['country']=='Bahamas'?' selected ':''?>>Bahamas</option>
	....
</select>

All you have to do is to replace

<option value="([A-Za-z0-9_ -]+)">([A-Za-z0-9_ -]+)</option>

with

<option value="$1" <?=$_POST['country']=='$1'?' selected ':''?>>$2</option>

Now only if designing forms with out tables was this easy