$query_cl_main = mysqli_query($conn, $select_cl_main);
$num_cl_main = mysqli_num_rows($query_cl_main);
for($k=0;$k<$num_cl_main;$k++) {
$temp_cl_main = mysqli_fetch_array($query_cl_main);
$db_cl_id = $temp_cl_main['id'];
$db_cl_name = $temp_cl_main['cl_name'];
$db_cl_work = $temp_cl_main['cl_work'];
$db_cl_work = mysqli_fetch_array(mysqli_query($conn, "SELECT cl_work_name FROM clients_work WHERE id ='$db_cl_work'"))['cl_work_name'];
$db_cl_town = $temp_cl_main['cl_town'];
$db_cl_size = $temp_cl_main['cl_size'];
$db_cl_size_sna = mysqli_fetch_array(mysqli_query($conn, "SELECT cl_size_short_name FROM clients_size WHERE id ='$db_cl_size'"))['cl_size_short_name'];
$db_cl_size_des = mysqli_fetch_array(mysqli_query($conn, "SELECT cl_size_description FROM clients_size WHERE id ='$db_cl_size'"))['cl_size_description'];
$db_cl_ins_date = $temp_cl_main['cl_ins_date'];
$db_cl_web = $temp_cl_main['cl_web'];
if($db_cl_web != NULL) {
$db_cl_web = '<a class="btn btn-warning btn-sm btn-block" href="'.$db_cl_web.'" target="_blank"><i class="fas fa-external-link-alt"> </i></a>';
}else {
$db_cl_web = '<a class="btn btn-warning btn-sm btn-block" disabled target="_blank"><i class="fa fa-times"> </i></a>';
}
$db_cl_user_id = $temp_cl_main['cl_user_id'] ;
$db_cl_user_name = mysqli_fetch_array(mysqli_query($conn, "SELECT name FROM user_login WHERE u_id = '$db_cl_user_id'"))['name'];
$db_cl_user_surname = mysqli_fetch_array(mysqli_query($conn, "SELECT surname FROM user_login WHERE u_id = '$db_cl_user_id'"))['surname'];
$db_cl_status = $temp_cl_main['cl_status'];
$db_cl_id = $temp_cl_main['id'];
$call_count = mysqli_num_rows(mysqli_query($conn, "SELECT * FROM calls WHERE cl_id = '$db_cl_id'"));
if($call_count > 9) {
$call_count = "9+";
}
$status = mysqli_fetch_array(mysqli_query($conn, "SELECT status FROM clients_status WHERE status_id ='$db_cl_status'"))['status'];
$bg_color = mysqli_fetch_array(mysqli_query($conn, "SELECT bg_color FROM clients_status WHERE status_id ='$db_cl_status'"))['bg_color'];
Maybe with joins?