Change bootstrap menu according to page width - html

Question

I'm developing a web application and I put in my application the bootstrap menu I would like when the application reaches the maximum width of max-width: 770px the menu would be the same as the menu that is in the normal width of the page.
But when giving the display none in the menu navbar-header it does not exit and the menu nav navbar-nav does not appear in the maximum width of the page of 770px
Menu in the normal width of the page
Menu at the maximum width of 770px
<div class="body-wrap" >
<nav class="navbar navbar-inverse" role="navigation" id="azul">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" ></a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<div class="conteudo"><li>Pagina Principal</li></div>
<div class="conteudo"> <li>Contato</li></div>
<li class="dropdown">
<div class="conteudo"> Produtos <b class="caret"></b></div>
<ul class="dropdown-menu">
<li>Camisetas</li>
<li class="divider"></li>
<li>Calças</li>
<li class="divider"></li>
<li>Bermudas</li>
</ul>
</li>
</ul>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container-fluid -->
CSS
#media (max-width: 770px) {
body{
background-color: yellow;
}
.navbar-header{
display: none;
}
.nav .navbar-nav{
display: inline;
}
}

Answer 1

I am not sure If I got what you mean but if you want to disable navbar-collapse you can simply add this CSS:
.navbar-collapse.collapse {
display: block!important;
}
.navbar-nav>li, .navbar-nav {
float: left !important;
}
.navbar-nav.navbar-right:last-child {
margin-right: -15px !important;
}
.navbar-right {
float: right!important;
}
Fiddle here

Answer 2

You can simply remove:
the button in element with class "navbar-header"
remove css classes "collapse navbar-collapse"
In this way the button disappear and you don't need to add extra css rules.
The main bar will remain visible with all widths.