refactored some code in BootNavbar
refactored some code in BootNavbar

motin/yii-bootstrap,66ru/yii-bootstrap,theblacksmith/yii-bootstrap,66ru/yii-bootstrap,theblacksmith/yii-bootstrap,66ru/yii-bootstrap,theblacksmith/yii-bootstrap,theblacksmith/yii-bootstrap,motin/yii-bootstrap,motin/yii-bootstrap