I need to place multiple columns of inputs in single line like this:
I did this by grouping
To align easily things in bootstrap 3, You should use the Grid System.
Here is a fiddle close to your needs :
<body>
<form class="form-horizontal">
<div class="row">
<div class="form-group">
<label class="col-sm-2">Quarter</label>
<div class="col-sm-10"><input type="text" class="form-control" /></div>
</div>
</div>
<div class="row">
<div class="form-group">
<label class="col-sm-2">Address</label>
<div class="col-sm-5"><input type="text" class="form-control" /></div>
</div>
<div class="form-group">
<label class="col-sm-2">Addr. №</label>
<div class="col-sm-3"><input type="text" class="form-control" /></div>
</div>
</div>
<div class="row">
<div class="form-group">
<label class="col-sm-2">Block name/Number</label>
<div class="col-sm-1"><input type="text" class="form-control" /></div>
</div>
<div class="form-group">
<label class="col-sm-1">Entrance</label>
<div class="col-sm-1"><input type="text" class="form-control" /></div>
</div>
<div class="form-group">
<label class="col-sm-1">Floor</label>
<div class="col-sm-1"><input type="text" class="form-control" /></div>
</div>
<div class="form-group">
<label class="col-sm-2">Apartament</label>
<div class="col-sm-3"><input type="text" class="form-control" /></div>
</div>
</div>
</form>
</body>
The alignment depends on the width of the screen so be sure to tune it properly to your needs. Then you can style the inputs themselves.
You need to wrap the inputs in their own col-*
classes like this..
<form class="form-horizontal">
<div class="form-group">
<label class="control-label col-sm-2">Quarter</label>
<div class="col-md-10">
<input type="text" class="form-control">
</div>
</div>
<div class="form-group">
<label class="control-label col-sm-2">Address</label>
<div class="col-md-8">
<input type="text" class="form-control">
</div>
<label class="control-label col-sm-1">Addr. №</label>
<div class="col-md-1">
<input type="text" class="form-control">
</div>
</div>
<div class="form-group">
<label class="control-label col-sm-2">Block name/Number</label>
<div class="col-md-4">
<input type="text" class="form-control">
</div>
<label class="control-label col-sm-1">Entrance</label>
<div class="col-md-1">
<input type="text" class="form-control">
</div>
<label class="control-label col-sm-1">Floor</label>
<div class="col-md-1">
<input type="text" class="form-control">
</div>
<label class="control-label col-sm-1">Apartment</label>
<div class="col-md-1">
<input type="text" class="form-control">
</div>
</div>
</form>
Demo
Also, there is no col-sm-15
or col-sm-20
in Bootstrap