Moving multidimensional array values

I'm trying print out a multidimensional array in this manner:

Image showing how i'm trying to display it

What i'm having a problem with is finding the duplicate STEAM IDs, removing the duplicate STEAM ID and then moving the data of the removed STEAM ID to the master STEAM ID. Sorry if that's a little confusing. Any ideas? 

Here is the foreach loop that i'm using

echo '"' . $r['steamid'] . '"' . "<br />";
            echo "{" . "<br />";
                echo '      "' . $r['wepid'] . '"' . '   //' . $r['wepname'] . "<br />";
                echo '{' . "<br />";
                echo '"level"' . '      "' . $r['weplvl'] . '"' . "<br />";
                echo '"quality"' . '      "' . $r['weprare'] . '"' . "<br />";

            if($r['attr1'] === 0 || $r['attr1'] === ''){
                echo '';
            }else{
                echo '"1"' . '      "' . $r['attr1'] . ' ; ' . $r['val1'] . '"' . "<br />";
            }

            if($r['attr2'] === 0 || $r['attr2'] === ''){
                echo '';
            }else{
                echo '"2"' . '      "' . $r['attr2'] . ' ; ' . $r['val2'] . '"' . "<br />";
            }

            if($r['attr3'] === 0 || $r['attr3'] === ''){
                echo '';
            }else{
                echo '"3"' . '      "' . $r['attr3'] . ' ; ' . $r['val4'] . '"' . "<br />";
            }

            if($r['attr4'] === 0 || $r['attr4'] === ''){
                echo '';
            }else{
                echo '"4"' . '      "' . $r['attr4'] . ' ; ' . $r['val4'] . '"' . "<br />";
            }

            if($r['attr5'] === 0 || $r['attr5'] === ''){
                echo '';
            }else{
                echo '"5"' . '      "' . $r['attr5'] . ' ; ' . $r['val5'] . '"' . "<br />";
            }

            if($r['attr6'] === 0 || $r['attr6'] === ''){
                echo '';
            }else{
                echo '"6"' . '      "' . $r['attr6'] . ' ; ' . $r['val6'] . '"' . "<br />";
            }

            if($r['attr7'] === 0 || $r['attr7'] === ''){
                echo '';
            }else{
                echo '"7"' . '      "' . $r['attr7'] . ' ; ' . $r['val7'] . '"' . "<br />";
            }

            if($r['attr8'] === 0 || $r['attr8'] === ''){
                echo '';
            }else{
                echo '"8"' . '      "' . $r['attr8'] . ' ; ' . $r['val8'] . '"' . "<br />";
            }

            if($r['attr9'] === 0 || $r['attr9'] === ''){
                echo '';
            }else{
                echo '"9"' . '      "' . $r['attr9'] . ' ; ' . $r['val9'] . '"' . "<br />";
            }

            if($r['attr10'] === 0 || $r['attr10'] === ''){
                echo '';
            }else{
                echo '"10"' . '      "' . $r['attr10'] . ' ; ' . $r['val10'] . '"' . "<br />";
            }

            if($r['attr11'] === 0 || $r['attr11'] === ''){
                echo '';
            }else{
                echo '"11"' . '      "' . $r['attr11'] . ' ; ' . $r['val11'] . '"' . "<br />";
            }

            if($r['attr12'] === 0 || $r['attr12'] === ''){
                echo '';
            }else{
                echo '"12"' . '      "' . $r['attr12'] . ' ; ' . $r['val12'] . '"' . "<br />";
            }

            if($r['attr13'] === 0 || $r['attr13'] === ''){
                echo '';
            }else{
                echo '"13"' . '      "' . $r['attr13'] . ' ; ' . $r['val13'] . '"' . "<br />";
            }

            if($r['attr14'] === 0 || $r['attr14'] === ''){
                echo '';
            }else{
                echo '"14"' . '      "' . $r['attr14'] . ' ; ' . $r['val14'] . '"' . "<br />";
            }

            if($r['attr15'] === 0 || $r['attr15'] === ''){
                echo '';
            }else{
                echo '"15"' . '      "' . $r['attr15'] . ' ; ' . $r['val15'] . '"' . "<br />";
            }

            if($r['attr16'] === 0 || $r['attr16'] === ''){
                echo '';
            }else{
                echo '"16"' . '      "' . $r['attr16'] . ' ; ' . $r['val16'] . '"' . "<br />";
            }



                echo "<br />";
            echo '}' . "<br />";
            echo '}' . "<br />";
            echo "<br />";

Here is my query

 if ($stmt = $mysqli->prepare($query)) {
       $stmt->execute();
        $stmt->bind_result($id, $steamid, $wepid, $weplvl, $weprare, $attr1, $attr2, $attr3, $attr4, $attr5, $attr6, $attr7, $attr8, $attr9, $attr10, $attr11, $attr12, $attr13, $attr14, $attr15, $attr16, $val1, $val2, $val3, $val4, $val5, $val6, $val7, $val8, $val9, $val10, $val11, $val12, $val13, $val14, $val15, $val16);

            while ($row = $stmt->fetch()) {



             $data[] = array(
                'steamid' => $steamid,
                'wepid' => $wepid,
                'weplvl' => $weplvl,
                'wepname' => $wep,
                'weprare' => $weprare,
                'attr1' => $attr1, 
                'attr2' => $attr2, 
                'attr3' => $attr3, 
                'attr4' => $attr4, 
                'attr5' => $attr5, 
                'attr6' => $attr6, 
                'attr7' => $attr7, 
                'attr8' => $attr8, 
                'attr9' => $attr9, 
                'attr10' => $attr10, 
                'attr11' => $attr11, 
                'attr12' => $attr12, 
                'attr13' => $attr13, 
                'attr14' => $attr14, 
                'attr15' => $attr15, 
                'attr16' => $attr16, 
                'val1' => $val1,
                'val2' => $val2,
                'val3' => $val3,
                'val4' => $val4,
                'val5' => $val5,
                'val6' => $val6,
                'val7' => $val7,
                'val8' => $val8,
                'val9' => $val9,
                'val10' => $val10,
                'val11' => $val11,
                'val12' => $val12,
                'val13' => $val13,
                'val14' => $val14,
                'val15' => $val15,
                'val16' => $val16,
             );

              array_unique($data);




             }                          
          $stmt->close();
    }