Changing .less file

css/bootstrap-multiselect.css

-.multiselect-container{position:absolute;list-style-type:none;margin:0;padding:0}.multiselect-container .input-group{margin:5px}.multiselect-container>li{padding:0}.multiselect-container>li>a.multiselect-all label{font-weight:700}.multiselect-container>li>label.multiselect-group{margin:0;padding:3px 20px;height:100%;font-weight:700}.multiselect-container>li>a{padding:0}.multiselect-container>li>a>label{margin:0;height:100%;cursor:pointer;font-weight:400;padding:3px 20px 3px 40px}.multiselect-container>li>a>label.radio,.multiselect-container>li>a>label.checkbox{margin:0}.multiselect-container>li>a>label>input[type=checkbox]{margin-bottom:5px}.form-inline .multiselect-container label.checkbox,.form-inline .multiselect-container label.radio{padding: 3px 20px 3px 40px}.form-inline .multiselect-container li a label.checkbox input[type=checkbox],.form-inline .multiselect-container li a label.radio input[type=radio]{margin-left: -20px;margin-right: 0px}.btn-group>.btn-group:nth-child(2)>.multiselect.btn{border-top-left-radius:4px;border-bottom-left-radius:4px}
+.multiselect-container{position:absolute;list-style-type:none;margin:0;padding:0}.multiselect-container .input-group{margin:5px}.multiselect-container>li{padding:0}.multiselect-container>li>a.multiselect-all label{font-weight:700}.multiselect-container>li>label.multiselect-group{margin:0;padding:3px 20px;height:100%;font-weight:700}.multiselect-container>li>a{padding:0}.multiselect-container>li>a>label{margin:0;height:100%;cursor:pointer;font-weight:400;padding:3px 20px 3px 40px}.multiselect-container>li>a>label.radio,.multiselect-container>li>a>label.checkbox{margin:0}.multiselect-container>li>a>label>input[type=checkbox]{margin-bottom:5px}.btn-group>.btn-group:nth-child(2)>.multiselect.btn{border-top-left-radius:4px;border-bottom-left-radius:4px}.form-inline .multiselect-container label.checkbox,.form-inline .multiselect-container label.radio{padding:3px 20px 3px 40px}.form-inline .multiselect-container li a label.checkbox input[type=checkbox],.form-inline .multiselect-container li a label.radio input[type=radio]{margin-left:-20px;margin-right:0}
\ No newline at end of file

less/bootstrap-multiselect.less

@@ -58,3 +58,17 @@
   border-bottom-left-radius: 4px;
 }
 
+.form-inline .multiselect-container{
+ 
+  label.checkbox, label.radio{
+    padding: 3px 20px 3px 40px;
+  }
+ 
+  li a label{              
+  
+    &.checkbox input[type="checkbox"], &.radio input[type="radio"]{
+      margin-left: -20px;
+      margin-right: 0;
+    }
+  }
+}