<div class="form-group">
<label for="input-1">Ekip Üyelerini Seç</label>
<select name="ekip_uyeler[]" class="multi-select" multiple="multiple" id="my_multi_select3">
<?php
$ekip_uyeleri = $db->query("SELECT * FROM uyeler")->select();
$secilenUyeId = $db->query("SELECT uye_id FROM uyeler where secilen = true")->select();
if($ekip_uyeleri==true){
foreach ($ekip_uyeleri as $key => $uyeler) {
?>
if($uyeler['uye_id']!=$secilenUyeId){
<option value="<?=$uyeler['uye_id']; ?>"><?=$uyeler['uye_isim'].' '.$uyeler['uye_soyisim']; ?></option>
}
else{
<option value="<?=$uyeler['uye_id']; ?>"><?=$uyeler['uye_isim'].' '.$uyeler['uye_soyisim']; selected></option>
 }
<?php
}
}
?>
</select>
</div>