now i found the styles which are needed, that bootstrap 3.2.0 and 3.3.1 are working correctly with dnn
/*override for dnnLabels in the bootstrap */
.form-group .dnnLabel { text-align: left; width: auto; }
.dnnLabel + span { white-space: normal; }
/* ADMIN */
#ControlBar, #ControlBar:before, #ControlBar:after, #ControlBar *:before, #ControlBar *:after,
#ControlBar li, #ControlBar li:before, #ControlBar li:after,
#ControlBar a, #ControlBar a:before, #ControlBar a:after,
.dnn_mact, .dnn_mact:before, .dnn_mact:after, .dnn_mact *:before, .dnn_mact *:after,
.dnn_mact li, .dnn_mact li:before, .dnn_mact li:after { -webkit-box-sizing: content-box !important; /* Safari/Chrome, other WebKit */ -moz-box-sizing: content-box !important; /* Firefox, other Gecko */ box-sizing: content-box !important; /* Opera/IE 8+ */ }
/* fix for DNN dropdown lists being cut off*/
.dnnDropDownList .selected-item, .dnnDropDownList .selected-item a { height: 35px !important; }
/* fix for coloring on DNN Check boxes */
.dnnCheckbox .mark { background: none; }