assoc_to_uri($array)

rsegment($n[, $no_result = NULL])

total_segments()

uri_to_assoc([$n = 3[, $default = array()]])

total_rsegments()

segment_array()

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

ruri_string()

rsegment_array()

class CI_URI segment($n[, $no_result = NULL])