<input type="text" name="daterange" id="daterange" class="form-control"  />

<script>

//Date Range picker

    $('#daterange').daterangepicker({

locale: {

            format: 'Y-M-D',

separator: " to "

        },

ranges: {

           'Today': [moment(), moment()],

           'Yesterday': [moment().subtract(1, 'days'), moment().subtract(1, 'days')],

           'Last 7 Days': [moment().subtract(6, 'days'), moment()],

           'Last 30 Days': [moment().subtract(29, 'days'), moment()],

           'This Month': [moment().startOf('month'), moment().endOf('month')],

           'Last Month': [moment().subtract(1, 'month').startOf('month'), moment().subtract(1, 'month').endOf('month')]

        }

    });

</script> 

Get Start and End Date from Date Range

<?php $daterange = explode('to',$this->input->post('daterange'));

$startDate = $daterange[0];

$endDate = $daterange[1];

?>