Why using DIV's in a table ?
You can get the same result by floating the two divs with CSS.
html :
<html>
<head>
<style>
#divone {
width: 50%;
float: left;
}
#divtwo {
width: 50%;
float: left;
}
</style>
</head>
<body>
<div id='divone'>bla bla bla</div>
<div id='divtwo'>bla bla bla</div>
</body>
</div>
If you persist in keeping the divs in a table column I don't see the problem because the row of the table will automatically expand to the content of the largest div.
An example of your code would the interesting to see what you want to achieve.
Unsolved 
