welcome.php

<?php

public function show()
{
    $year = $this->uri->segment(3);
    $month = $this->uri->segment(4);
    $day = $this->uri->segment(5);
    $date = $year . '-' . $month . '-' . $day;
    $data['day'] = date('d/m/Y', strtotime($date));
    $data['tasks'] = $this->tasks_model->day_tasks($date);
    $this->load->view('show', $data);
}