diff --git a/apps/cli/cli_common.c b/apps/cli/cli_common.c
index 6b46bc2b..df01dffe 100644
--- a/apps/cli/cli_common.c
+++ b/apps/cli/cli_common.c
@@ -377,7 +377,7 @@ cli_dbxml(clicon_handle       h,
 {
     int        retval = -1;
     cbuf      *api_path_fmt_cb = NULL;    /* xml key format */
-    char      *api_path_fmt;    /* xml key format */
+    char      *api_path_fmt;
     char      *api_path_fmt01 = NULL;
     char      *api_path = NULL; 
     cbuf      *cb = NULL;
@@ -392,7 +392,6 @@ cli_dbxml(clicon_handle       h,
     char      *mtpoint = NULL;
     yang_stmt *yspec0 = NULL;
     int        argc = 0;
-    int        i;
 
     /* Top-level yspec */
     if ((yspec0 = clicon_dbspec_yang(h)) == NULL){
@@ -403,22 +402,11 @@ cli_dbxml(clicon_handle       h,
         clicon_err(OE_UNIX, errno, "cbuf_new");
         goto done;
     }
-    /* Iterate through all api_path_fmt:s, assume they start with / */
-    for (argc=0; argc<cvec_len(argv); argc++){
-        cv = cvec_i(argv, argc);
-        str = cv_string_get(cv);
-        if (str[0] != '/')
-            break;
-    }
-    if (argc == 0){
-        clicon_err(OE_PLUGIN, EINVAL, "No <api_path_fmt> in argv");
+    /* Concatenate all argv strings to a sinle string */
+    if (cvec_concat_cb(argv, api_path_fmt_cb) < 0)
         goto done;
-    }
-    /* Append a api_path_fmt from sub-parts */
-    for (i=argc-1; i>=0; i--){
-        cprintf(api_path_fmt_cb, "%s", cv_string_get(cvec_i(argv, i)));
-    }
     api_path_fmt = cbuf_get(api_path_fmt_cb);
+    argc = cvec_len(argv);
     if (cvec_len(argv) > argc){ 
         cv = cvec_i(argv, argc++);
         str = cv_string_get(cv);
@@ -1654,6 +1642,45 @@ cvec_append(cvec *cvv0,
     return cvv2;
 }
 
+/*! Concatenate all strings in a cvec into a single string
+ *
+ * @param[in]  cvv    Input vector
+ * @param[out] appstr Concatenated string as existing cbuf
+ */
+int
+cvec_concat_cb(cvec  *cvv,
+               cbuf  *cb)
+{
+    int     retval = -1;
+    int     argc;
+    cg_var *cv;
+    char   *str;
+    int     i;
+    
+    if (cb == NULL){
+        clicon_err(OE_PLUGIN, EINVAL, "cb is NULL");
+        goto done;
+    }
+    /* Iterate through all api_path_fmt:s, assume they start with / */
+    for (argc=0; argc<cvec_len(cvv); argc++){
+        cv = cvec_i(cvv, argc);
+        str = cv_string_get(cv);
+        if (str[0] != '/')
+            break;
+    }
+    if (argc == 0){
+        clicon_err(OE_PLUGIN, EINVAL, "No <api_path_fmt> in cvv");
+        goto done;
+    }
+    /* Append a api_path_fmt from sub-parts */
+    for (i=argc-1; i>=0; i--){
+        cprintf(cb, "%s", cv_string_get(cvec_i(cvv, i)));
+    }
+    retval = 0;
+ done:
+    return retval;
+}
+
 /*! Process control as defined by clixon-lib API
  *
  * @param[in] h      Clicon handle
diff --git a/apps/cli/cli_common.h b/apps/cli/cli_common.h
index 05e05080..b60f3cb8 100644
--- a/apps/cli/cli_common.h
+++ b/apps/cli/cli_common.h
@@ -43,6 +43,7 @@ void  cli_signal_block(clicon_handle h);
 void  cli_signal_unblock(clicon_handle h);
 int   mtpoint_paths(yang_stmt *yspec0, char *mtpoint, char *api_path_fmt1, char **api_path_fmt01);
 cvec *cvec_append(cvec *cvv0, cvec *cvv1);
+int   cvec_concat_cb(cvec *cvv, cbuf *cb);
 
 /* If you do not find a function here it may be in clixon_cli_api.h which is 
    the external API */
diff --git a/apps/cli/cli_show.c b/apps/cli/cli_show.c
index 00d25051..47abea60 100644
--- a/apps/cli/cli_show.c
+++ b/apps/cli/cli_show.c
@@ -194,7 +194,8 @@ expand_dbvar(void   *h,
              cvec   *helptexts)
 {
     int              retval = -1;
-    char            *api_path_fmt = NULL;
+    cbuf            *api_path_fmt_cb = NULL;
+    char            *api_path_fmt;
     char            *api_path = NULL;
     char            *api_path_fmt01 = NULL;
     char            *dbstr;
@@ -226,8 +227,8 @@ expand_dbvar(void   *h,
     cvec            *nsc0 = NULL;
     char            *str;
     int              grouping_treeref;
-    cbuf            *cbprepend;
-
+    cvec            *callback_cvv;
+    
     if (argv == NULL || (cvec_len(argv) != 2 && cvec_len(argv) != 3)){
         clicon_err(OE_PLUGIN, EINVAL, "requires arguments: <db> <apipathfmt> [<mountpt>]");
         goto done;
@@ -253,23 +254,18 @@ expand_dbvar(void   *h,
     }
     if (autocli_grouping_treeref(h, &grouping_treeref) < 0)
         goto done;
-    if (grouping_treeref &&
-        (cbprepend = cligen_expand_prepend_get(cli_cligen(h))) != NULL){
-        cbuf *cb;
-        if ((cb = cbuf_new()) == NULL){
-            clicon_err(OE_UNIX, errno, "cbuf_new");
-            goto done;
-        }
-        cprintf(cb, "%s%s", cbuf_get(cbprepend), cv_string_get(cv));
-        if ((api_path_fmt = strdup(cbuf_get(cb))) == NULL){
-            clicon_err(OE_UNIX, errno, "strdup");
-            goto done;
-        }
-    }
-    else if ((api_path_fmt = strdup(cv_string_get(cv))) == NULL){
-        clicon_err(OE_UNIX, errno, "strdup");
+    if ((api_path_fmt_cb = cbuf_new()) == NULL){
+        clicon_err(OE_PLUGIN, errno, "cbuf_new");       
         goto done;
     }
+    if (grouping_treeref &&
+        (callback_cvv = cligen_callback_arguments_get(cli_cligen(h))) != NULL){
+        /* Concatenate callback arguments to a singel prepend string */
+        if (cvec_concat_cb(callback_cvv, api_path_fmt_cb) < 0)
+            goto done;        
+    }
+    cprintf(api_path_fmt_cb, "%s", cv_string_get(cv));
+    api_path_fmt = cbuf_get(api_path_fmt_cb);
     if (cvec_len(argv) > 2){ 
         cv = cvec_i(argv, 2);
         str = cv_string_get(cv);
@@ -414,8 +410,8 @@ expand_dbvar(void   *h,
   done:
     if (nsc0)
         cvec_free(nsc0);
-    if (api_path_fmt)
-        free(api_path_fmt);
+    if (api_path_fmt_cb)
+        cbuf_free(api_path_fmt_cb);
     if (api_path_fmt01)
         free(api_path_fmt01);
     if (cbxpath)