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I am following the documentation but I can not change the format to the BR standard, follows below my codes:
Loading css. and . js files into my template:
<!-- DATAPICKER -->
<link href=' <?php echo base_url('assets/plugins/datepicker/datepicker3.css'); ?>' rel='stylesheet' />
<script type="text/javascript" src='<?php echo base_url('assets/plugins/datepicker/bootstrap-datepicker.js'); ?>'>
</script>
<script type="text/javascript" src='<?php echo base_url('assets/plugins/datepicker/locales/bootstrap-datepicker.pt-BR.js'); ?>'>
</script> 
view where to generate the datapicker in br format:
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <script type="text/javascript">  
        $(function(){
            $("#produto").autocomplete({
                source: "produtos/get_produto", // path to the method
                appendTo: $("#new_orcamento")
            });
        }); 
    </script>
    <script type="text/javascript">  
        $(function(){
            $("#cliente").autocomplete({
                source: "clientes/get_cliente", // path to the method
                appendTo: $("#new_orcamento")
            });
        }); 
    </script>
    <script type="text/javascript"> 
    $(function(){ 
        $('#search').datepicker({
            dateFormat: "yy-mm-dd",
            language: 'pt-BR'
        });
    });
    </script>
</head>
<body>
    <form action="/sistema/orcamentos/pesquisar1" method="post">
        <div class="row">
            <div class="col-sm-3">
                <div lass="form-group">
                    <input name="search1" class="form-control" id="search" type="text"
                        placeholder="Filtrar Cliente" value="<?php echo $view_termo1??null ;?>"> 
                        <span class="input-group-btn"> </span>
                </div>
            </div>
            <div class="col-sm-3">
                <div class="form-group">
                    <input name="search2" class="form-control" id="search" type="text"
                        placeholder="Filtrar Produto" value="<?php echo $view_termo2??null ;?>"> 
                        <span class="input-group-btn"></span>
                </div>
            </div>
            <div class="col-sm-3">
                <div class="form-group">
                    <input name="search3" class="form-control" id="search" type="text"
                        placeholder="Filtrar Situação" value="<?php echo $view_termo3??null ;?>"> 
                        <span  class="input-group-btn"> </span>
                </div>
            </div>
            <div class="col-sm-1">
                <button class="btn btn-primary " type="submit">Filtrar</button>
            </div>
        </div>
        <div class="row">
            <div class="col-sm-3">
                <div lass="form-group">
                    <input name="search4" class="form-control" id="search" type="text"
                        placeholder="Filtrar Representante" value="<?php echo $view_termo4??null ;?>"> 
                        <span class="input-group-btn"> </span>
                </div>
            </div>
            <div class="col-sm-3">
                <div class="form-group">                        
                    <div class="input-group date" data-provide="datepicker">
                        <input type="text" class="form-control" id="search" name="search5" 
                        placeholder="Data Inicio" value="<?php echo $view_termo5??null ;?>"> 
                        <div class="input-group-addon">
                             <span class="glyphicon glyphicon-th"></span>
                        </div>
                    </div>
                </div>
            </div>
            <div class="col-sm-3">
                <div class="form-group">                        
                    <div class="input-group date" data-provide="datepicker">
                        <input type="text" class="form-control" id="search" name="search6" 
                        placeholder="Data Fim" value="<?php echo $view_termo5??null ;?>"> 
                        <div class="input-group-addon">
                             <span class="glyphicon glyphicon-th"></span>
                        </div>
                    </div>
                </div>
            </div>
            <div class="col-sm-2">
                <a data-toggle="modal" data-target="#new_orcamento" class="btn btn-primary ">Novo Orçamento</a>
            </div>
        </div>
    </form>
See that I’ve already changed the dateFormat for yy/mm/dd which is what I want but still when I use the datepicker it shows the date in the default format mm/dd/yyyy