segment repeatation

[eluser]Unknown[/eluser]
I've made a anchor in my view file like

<?php echo anchor('upload', 'Upload Another File!'); ?>

where upload is my controller and index is my function which is default. when i hover my mouse over this particular link or click on, it's display on status bar or in address bar like this

http://localhost/index.php/upload/index.php/upload Wrong

But it should be like this

http://localhost/index.php/upload/ Right

Suggest me where do i make changes?