Need to have input tag instead of browse button in uploading a file in php

Need to have input tag instead of browse button in uploading a file in php

I'm a newbie in php programming. I'm currently creating a user profile in
which i need to allow users to upload a profile picture. So I've coded
like this
<?php echo form_open_multipart('','class="form-horizontal span4"');?>
<img src="PATH TO IMAGE" />
<input type="text" name="userfile" />
<input class="btn" type="submit" value="Upload" />
<?php echo form_close();?>
and so I'm getting a structure like the one above.
But what I need is something like the one in the second image. Is this
possible... If yes please help or at least share a link.

Any help is appreciated. Thanks in advance...