<option value="<?php $baris['nama_supplier'] ?>" <?php if     ($supplier==$baris['nama_supplier']) echo 'selected="selected"'; ?> > <?php echo  $baris['nama_supplier']; ?> </option>;

<option <?php $val=$baris['nama_supplier']; echo "value='$val'";  if($supplier==$val) echo "selected='selected'>";echo $val;?> </option>;