CI_URI::slash_segment()

slash_segment($n[, $where = 'trailing'])

This method is almost identical to segment(), except it adds a trailing and/or leading slash based on the second parameter. If the parameter is not used, a trailing slash added. Examples:

$this->uri->slash_segment(3);
$this->uri->slash_segment(3, 'leading');
$this->uri->slash_segment(3, 'both');

Returns:

1. segment/
2. /segment
3. /segment/