function ActualMarker1(){
        rIcon = L.icon({
  iconUrl: "marcadores/marker-icon-violet.png",
  })
    for ( var i=0; i < markers.length; ++i ){
        L.marker( [markers[0].lat, markers[0].lng], {icon: rIcon} )
        .bindPopup( 'Evasión Control' ).addTo( cities );
    }
   }

  function ActualMarker2(){
    rIcon = L.icon({
iconUrl: "marcadores/marker-icon-green.png",
})
    for ( var  i=0; i < markers.length; ++i ){
        L.marker( [markers[0].lat, markers[0].lng], {icon: rIcon} )
        .bindPopup( 'Emisiones Diesel' ).addTo( cities );
    }
   }

   function ActualMarker3(){
     rIcon = L.icon({
 iconUrl: "marcadores/marker-icon-yellow.png",
 })
    for ( var  i=0; i < markers.length; ++i ){
        L.marker( [markers[0].lat, markers[0].lng], {icon: rIcon} )
        .bindPopup( 'Control Taximetros' ).addTo( cities );
    }
     }

     function ActualMarker4(){
        rIcon = L.icon({
  iconUrl: "marcadores/marker-icon-violet.png",
  })
    for ( var i=0; i < markers.length; ++i ){
        L.marker( [markers[1].lat, markers[1].lng], {icon: rIcon} )
        .bindPopup( 'Evasión Control' ).addTo( cities );
    }
   }

  function ActualMarker5(){
    rIcon = L.icon({
iconUrl: "marcadores/marker-icon-green.png",
})
    for ( var  i=0; i < markers.length; ++i ){
        L.marker( [markers[1].lat, markers[1].lng], {icon: rIcon} )
        .bindPopup( 'Emisiones Diesel' ).addTo( cities );
    }
   }

   function ActualMarker6(){
     rIcon = L.icon({
 iconUrl: "marcadores/marker-icon-yellow.png",
 })
    for ( var  i=0; i < markers.length; ++i ){
        L.marker( [markers[1].lat, markers[1].lng], {icon: rIcon} )
        .bindPopup( 'Control Taximetros' ).addTo( cities );
    }
     }

     function ActualMarker7(){
        rIcon = L.icon({
  iconUrl: "marcadores/marker-icon-violet.png",
  })
    for ( var i=0; i < markers.length; ++i ){
        L.marker( [markers[2].lat, markers[2].lng], {icon: rIcon} )
        .bindPopup( 'Evasión Control' ).addTo( cities );
    }
   }

  function ActualMarker8(){
    rIcon = L.icon({
iconUrl: "marcadores/marker-icon-green.png",
})
    for ( var  i=0; i < markers.length; ++i ){
        L.marker( [markers[2].lat, markers[2].lng], {icon: rIcon} )
        .bindPopup( 'Emisiones Diesel' ).addTo( cities );
    }
   }

   function ActualMarker9(){
     rIcon = L.icon({
 iconUrl: "marcadores/marker-icon-yellow.png",
 })
    for ( var  i=0; i < markers.length; ++i ){
        L.marker( [markers[2].lat, markers[2].lng], {icon: rIcon} )
        .bindPopup( 'Control Taximetros' ).addTo( cities );
    }
     }

<?php
for($i=0; $i<count($f_result); $i++){

if($f_result[0]->ot == 95)
{
    echo "<script>";
    echo "ActualMarker1();";
    echo "</script>";
}elseif($f_result[0]->ot == 98)
{
    echo "<script>";
    echo "ActualMarker2();";
    echo "</script>";
}elseif($f_result[0]->ot == 102)
{
    echo "<script>";
    echo "ActualMarker3();";
    echo "</script>";
}
     if($f_result[1]->ot == 95)

    {
        echo "<script>";
        echo "ActualMarker4();";
        echo "</script>";
    }elseif($f_result[1]->ot == 98)
    {
        echo "<script>";
        echo "ActualMarker5();";
        echo "</script>";
    }elseif($f_result[1]->ot == 102)
    {
        echo "<script>";
        echo "ActualMarker6();";
        echo "</script>";
    }
      if($f_result[2]->ot == 95)
  {
      echo "<script>";
      echo "ActualMarker7();";
      echo "</script>";
  }elseif($f_result[2]->ot == 98)
  {
    echo "<script>";
      echo "ActualMarker8();";
      echo "</script>";
  }elseif($f_result[2]->ot == 102)
  {
      echo "<script>";
      echo "ActualMarker9();";
      echo "</script>";
}else{
  echo "esto no esta funcionando bien";
}

}

?>

const valores = [
    {
      iconUrl: "marcadores/marker-icon-violet.png",
      markerIndex: 0,
      texto: 'Evasión Control'
    },
    {
      iconUrl: "marcadores/marker-icon-green.png",
      markerIndex: 0,
      texto: 'Emisiones Diesel'
    },
    ...

function ActualMarker(indice) {
  const iconUrls = [ "marcadores/marker-icon-violet.png", "marcadores/marker-icon-green.png", "marcadores/marker-icon-yellow.png" ];
  const textos = ['Evasión Control', 'Emisiones Diesel', 'Control Taximetros'];

  const iconUrl = iconUrls[ (indice-1) % 3 ];
  const texto = textos[ (indice-1) % 3 ];
  const markerIndex = Math.floor( indice / 3 );

  rIcon = L.icon({ iconUrl: iconUrl })
  for (var i = 0; i < markers.length; ++i) {
    L.marker([markers[ markerIndex ].lat, markers[ markerIndex ].lng], {
        icon: rIcon
      })
      .bindPopup( texto ).addTo(cities);
  }
}

// no usas $i en ningún lugar del bucle, ¿seguro que es correcto?
for($i=0; $i<count($f_result); $i++){

  switch ($f_result[0]) {
    case  95: echo '<script>ActualMarker(1)</script>'; break;
    case  98: echo '<script>ActualMarker(2)</script>'; break;
    case 102: echo '<script>ActualMarker(3)</script>'; break;
  }
  switch ($f_result[1]) {
    case  95: echo '<script>ActualMarker(4)</script>'; break;
    case  98: echo '<script>ActualMarker(5)</script>'; break;
    case 102: echo '<script>ActualMarker(6)</script>'; break;
  }
  switch ($f_result[2]) {
    case  95: echo '<script>ActualMarker(7)</script>'; break;
    case  98: echo '<script>ActualMarker(8)</script>'; break;
    case 102: echo '<script>ActualMarker(9)</script>'; break;
    default:  echo "esto no esta funcionando bien"; break;
  }
}